/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 17:04:07,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 17:04:07,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 17:04:07,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 17:04:07,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 17:04:07,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 17:04:07,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 17:04:07,776 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 17:04:07,800 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 17:04:07,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 17:04:07,801 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 17:04:07,801 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 17:04:07,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 17:04:07,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 17:04:07,802 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 17:04:07,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 17:04:07,802 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 17:04:07,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 17:04:07,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 17:04:07,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 17:04:07,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 17:04:07,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 17:04:07,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 17:04:07,803 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 17:04:07,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 17:04:07,803 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 17:04:07,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 17:04:07,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 17:04:07,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 17:04:07,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 17:04:07,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 17:04:07,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 17:04:07,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 17:04:07,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 17:04:07,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 17:04:07,804 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 17:04:07,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 17:04:07,804 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 17:04:07,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 17:04:07,804 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 17:04:07,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 17:04:08,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 17:04:08,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 17:04:08,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 17:04:08,091 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 17:04:08,092 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 17:04:08,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun.wvr.bpl [2021-06-05 17:04:08,093 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun.wvr.bpl' [2021-06-05 17:04:08,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 17:04:08,124 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 17:04:08,125 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 17:04:08,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 17:04:08,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 17:04:08,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:08" (1/1) ... [2021-06-05 17:04:08,138 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:08" (1/1) ... [2021-06-05 17:04:08,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 17:04:08,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 17:04:08,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 17:04:08,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 17:04:08,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:08" (1/1) ... [2021-06-05 17:04:08,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:08" (1/1) ... [2021-06-05 17:04:08,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:08" (1/1) ... [2021-06-05 17:04:08,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:08" (1/1) ... [2021-06-05 17:04:08,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:08" (1/1) ... [2021-06-05 17:04:08,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:08" (1/1) ... [2021-06-05 17:04:08,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:08" (1/1) ... [2021-06-05 17:04:08,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 17:04:08,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 17:04:08,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 17:04:08,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 17:04:08,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 17:04:08,222 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 17:04:08,223 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 17:04:08,223 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 17:04:08,223 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 17:04:08,223 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 17:04:08,223 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 17:04:08,223 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 17:04:08,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 17:04:08,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 17:04:08,224 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 17:04:08,224 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 17:04:08,224 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 17:04:08,224 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 17:04:08,427 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 17:04:08,428 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 17:04:08,429 INFO L202 PluginConnector]: Adding new model sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:04:08 BoogieIcfgContainer [2021-06-05 17:04:08,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 17:04:08,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 17:04:08,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 17:04:08,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 17:04:08,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:08" (1/2) ... [2021-06-05 17:04:08,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@158cd7bc and model type sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:04:08, skipping insertion in model container [2021-06-05 17:04:08,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:04:08" (2/2) ... [2021-06-05 17:04:08,434 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-fun.wvr.bpl [2021-06-05 17:04:08,438 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 17:04:08,438 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 17:04:08,438 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 17:04:08,439 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 17:04:08,497 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 17:04:08,512 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 17:04:08,526 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 17:04:08,526 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 17:04:08,527 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 17:04:08,527 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 17:04:08,527 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 17:04:08,527 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 17:04:08,527 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 17:04:08,527 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 17:04:08,543 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-05 17:04:08,562 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:08,563 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:08,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 17:04:08,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:08,573 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:08,573 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:08,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:08,581 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-06-05 17:04:08,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:08,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350253652] [2021-06-05 17:04:08,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:08,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:08,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350253652] [2021-06-05 17:04:08,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350253652] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:04:08,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:04:08,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 17:04:08,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171574208] [2021-06-05 17:04:08,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:04:08,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:08,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:04:08,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:04:08,747 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:08,803 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2021-06-05 17:04:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 17:04:08,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 17:04:08,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:08,811 INFO L225 Difference]: With dead ends: 154 [2021-06-05 17:04:08,811 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 17:04:08,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:04:08,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 17:04:08,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-06-05 17:04:08,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:08,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-05 17:04:08,844 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2021-06-05 17:04:08,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:08,845 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-05 17:04:08,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:08,845 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-05 17:04:08,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 17:04:08,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:08,847 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:08,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 17:04:08,847 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:08,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:08,848 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-06-05 17:04:08,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:08,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112363717] [2021-06-05 17:04:08,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:04:08,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:08,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112363717] [2021-06-05 17:04:08,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112363717] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:04:08,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:04:08,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 17:04:08,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882439213] [2021-06-05 17:04:08,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 17:04:08,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:08,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 17:04:08,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 17:04:08,893 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:08,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:08,930 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2021-06-05 17:04:08,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 17:04:08,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 17:04:08,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:08,932 INFO L225 Difference]: With dead ends: 158 [2021-06-05 17:04:08,932 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 17:04:08,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:04:08,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 17:04:08,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-06-05 17:04:08,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:08,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-05 17:04:08,946 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-05 17:04:08,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:08,946 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-05 17:04:08,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:08,947 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-05 17:04:08,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 17:04:08,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:08,948 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:08,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 17:04:08,948 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:08,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:08,949 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-06-05 17:04:08,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:08,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677570693] [2021-06-05 17:04:08,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:09,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:09,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677570693] [2021-06-05 17:04:09,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677570693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:09,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036305109] [2021-06-05 17:04:09,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:09,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 17:04:09,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:09,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:09,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:04:09,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:09,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:09,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:09,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-06-05 17:04:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:09,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036305109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:09,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:09,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:04:09,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724396989] [2021-06-05 17:04:09,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:04:09,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:09,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:04:09,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:04:09,651 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:09,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:09,833 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-05 17:04:09,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:04:09,834 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 17:04:09,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:09,837 INFO L225 Difference]: With dead ends: 330 [2021-06-05 17:04:09,837 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 17:04:09,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 312.8ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:04:09,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 17:04:09,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-05 17:04:09,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-05 17:04:09,862 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-05 17:04:09,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:09,862 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-05 17:04:09,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:09,862 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-05 17:04:09,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 17:04:09,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:09,863 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:10,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 17:04:10,081 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:10,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:10,081 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-06-05 17:04:10,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:10,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239445621] [2021-06-05 17:04:10,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:10,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:10,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239445621] [2021-06-05 17:04:10,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239445621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:10,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133499624] [2021-06-05 17:04:10,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:10,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:10,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:10,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 17:04:10,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:10,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:10,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 17:04:10,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:04:10,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:10,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:10,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-06-05 17:04:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:10,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133499624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:10,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:10,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 17:04:10,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073436634] [2021-06-05 17:04:10,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:10,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:10,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:10,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:10,556 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:10,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:10,941 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-05 17:04:10,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:04:10,948 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 17:04:10,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:10,950 INFO L225 Difference]: With dead ends: 374 [2021-06-05 17:04:10,950 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 17:04:10,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 425.2ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:04:10,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 17:04:10,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-05 17:04:10,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:10,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-05 17:04:10,957 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-05 17:04:10,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:10,958 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-05 17:04:10,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:10,958 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-05 17:04:10,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 17:04:10,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:10,959 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:11,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:11,177 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:11,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:11,178 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-06-05 17:04:11,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:11,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663824433] [2021-06-05 17:04:11,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:11,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:11,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663824433] [2021-06-05 17:04:11,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663824433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:11,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891544312] [2021-06-05 17:04:11,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:11,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:04:11,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:11,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 17:04:11,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:11,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:04:11,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:11,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:11,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:11,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-05 17:04:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:11,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891544312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:11,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:11,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 17:04:11,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655027889] [2021-06-05 17:04:11,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:04:11,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:11,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:04:11,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:04:11,516 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:11,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:11,654 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-06-05 17:04:11,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:04:11,654 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 17:04:11,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:11,656 INFO L225 Difference]: With dead ends: 296 [2021-06-05 17:04:11,656 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 17:04:11,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:04:11,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 17:04:11,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-06-05 17:04:11,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:11,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-05 17:04:11,662 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-05 17:04:11,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:11,662 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-05 17:04:11,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:11,662 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-05 17:04:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 17:04:11,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:11,663 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:11,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:11,877 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:11,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:11,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-06-05 17:04:11,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:11,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335108923] [2021-06-05 17:04:11,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:12,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:12,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335108923] [2021-06-05 17:04:12,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335108923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:12,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797474598] [2021-06-05 17:04:12,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:12,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:12,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:12,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 17:04:12,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:12,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:12,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 17:04:12,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:04:12,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:12,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:12,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:22 [2021-06-05 17:04:12,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:12,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797474598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:12,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:12,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:04:12,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671940607] [2021-06-05 17:04:12,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:04:12,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:12,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:04:12,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:04:12,199 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:12,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:12,385 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-05 17:04:12,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:04:12,385 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 17:04:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:12,387 INFO L225 Difference]: With dead ends: 425 [2021-06-05 17:04:12,387 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 17:04:12,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 212.1ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:04:12,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 17:04:12,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-05 17:04:12,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-05 17:04:12,394 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-05 17:04:12,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:12,394 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-05 17:04:12,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:12,394 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-05 17:04:12,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:12,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:12,395 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:12,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:12,597 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:12,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:12,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-06-05 17:04:12,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:12,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81028731] [2021-06-05 17:04:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:12,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:12,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81028731] [2021-06-05 17:04:12,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81028731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:12,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289679078] [2021-06-05 17:04:12,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:12,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:04:12,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:12,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:12,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:12,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289679078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:12,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:12,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 17:04:12,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676804423] [2021-06-05 17:04:12,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:04:12,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:12,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:04:12,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:04:12,764 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:13,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:13,135 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-05 17:04:13,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:04:13,136 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:13,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:13,139 INFO L225 Difference]: With dead ends: 619 [2021-06-05 17:04:13,139 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 17:04:13,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:04:13,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 17:04:13,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-05 17:04:13,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:13,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-05 17:04:13,147 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-05 17:04:13,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:13,148 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-05 17:04:13,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:13,148 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-05 17:04:13,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:13,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:13,149 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:13,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 17:04:13,369 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:13,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:13,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-06-05 17:04:13,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:13,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371117650] [2021-06-05 17:04:13,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:13,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:13,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371117650] [2021-06-05 17:04:13,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371117650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:13,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900214163] [2021-06-05 17:04:13,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:13,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:04:13,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:13,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:13,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:13,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900214163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:13,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:13,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:04:13,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403107034] [2021-06-05 17:04:13,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:13,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:13,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:13,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:13,538 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:14,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:14,213 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-05 17:04:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:04:14,214 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:14,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:14,218 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 17:04:14,218 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 17:04:14,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 415.6ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:04:14,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 17:04:14,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-05 17:04:14,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-05 17:04:14,229 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-05 17:04:14,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:14,230 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-05 17:04:14,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:14,230 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-05 17:04:14,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:14,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:14,230 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:14,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:14,447 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:14,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:14,447 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-06-05 17:04:14,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:14,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572802761] [2021-06-05 17:04:14,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:14,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:14,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572802761] [2021-06-05 17:04:14,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572802761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:14,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437545627] [2021-06-05 17:04:14,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:14,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:14,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:14,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437545627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:14,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:14,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:04:14,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555173687] [2021-06-05 17:04:14,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:14,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:14,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:14,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:14,586 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:15,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:15,203 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-05 17:04:15,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 17:04:15,204 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:15,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:15,207 INFO L225 Difference]: With dead ends: 951 [2021-06-05 17:04:15,207 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 17:04:15,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 399.6ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:04:15,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 17:04:15,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-05 17:04:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:15,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-05 17:04:15,216 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-05 17:04:15,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:15,216 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-05 17:04:15,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:15,217 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-05 17:04:15,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:15,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:15,217 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:15,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:15,433 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:15,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:15,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-06-05 17:04:15,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:15,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988482157] [2021-06-05 17:04:15,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:04:15,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:15,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988482157] [2021-06-05 17:04:15,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988482157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:15,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464625025] [2021-06-05 17:04:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:15,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 17:04:15,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:15,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:04:15,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464625025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:15,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:15,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 17:04:15,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704915593] [2021-06-05 17:04:15,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:04:15,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:15,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:04:15,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:04:15,524 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:15,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:15,622 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-05 17:04:15,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:04:15,622 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:15,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:15,624 INFO L225 Difference]: With dead ends: 669 [2021-06-05 17:04:15,624 INFO L226 Difference]: Without dead ends: 663 [2021-06-05 17:04:15,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:15,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-05 17:04:15,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-05 17:04:15,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:15,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-05 17:04:15,633 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-05 17:04:15,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:15,633 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-05 17:04:15,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:15,634 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-05 17:04:15,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:15,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:15,634 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:15,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 17:04:15,848 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:15,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:15,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-06-05 17:04:15,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:15,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078052456] [2021-06-05 17:04:15,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:15,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:15,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078052456] [2021-06-05 17:04:15,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078052456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:15,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26895390] [2021-06-05 17:04:15,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:15,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:15,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:15,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:15,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:15,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26895390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:15,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:15,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 17:04:15,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076442965] [2021-06-05 17:04:15,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:15,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:15,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:15,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:15,980 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:16,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:16,125 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-05 17:04:16,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:04:16,126 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:16,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:16,128 INFO L225 Difference]: With dead ends: 710 [2021-06-05 17:04:16,128 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 17:04:16,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:04:16,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 17:04:16,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-05 17:04:16,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:16,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-05 17:04:16,139 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-05 17:04:16,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:16,139 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-05 17:04:16,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:16,139 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-05 17:04:16,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:16,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:16,140 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:16,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 17:04:16,357 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:16,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:16,357 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-06-05 17:04:16,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:16,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731120445] [2021-06-05 17:04:16,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:04:16,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:16,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731120445] [2021-06-05 17:04:16,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731120445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:16,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338588565] [2021-06-05 17:04:16,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:16,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:16,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:16,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 17:04:16,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:04:16,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338588565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:16,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:16,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 17:04:16,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147011685] [2021-06-05 17:04:16,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:04:16,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:16,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:04:16,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:04:16,460 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:16,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:16,547 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-05 17:04:16,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:04:16,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:16,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:16,550 INFO L225 Difference]: With dead ends: 830 [2021-06-05 17:04:16,550 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 17:04:16,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:16,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 17:04:16,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-05 17:04:16,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:16,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-05 17:04:16,562 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-05 17:04:16,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:16,562 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-05 17:04:16,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:16,562 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-05 17:04:16,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:16,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:16,563 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:16,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 17:04:16,779 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:16,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:16,779 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-06-05 17:04:16,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:16,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344232640] [2021-06-05 17:04:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:16,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:16,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344232640] [2021-06-05 17:04:16,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344232640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:16,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495007029] [2021-06-05 17:04:16,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:16,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:04:16,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:16,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:16,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:16,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495007029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:16,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:16,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:04:16,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854953757] [2021-06-05 17:04:16,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:04:16,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:16,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:04:16,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:04:16,937 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:17,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:17,204 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-05 17:04:17,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 17:04:17,205 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:17,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:17,208 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 17:04:17,209 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 17:04:17,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:04:17,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 17:04:17,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-05 17:04:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:17,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-05 17:04:17,222 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-05 17:04:17,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:17,222 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-05 17:04:17,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:17,223 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-05 17:04:17,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:17,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:17,224 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:17,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 17:04:17,437 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:17,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:17,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-06-05 17:04:17,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:17,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65635765] [2021-06-05 17:04:17,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:17,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:17,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65635765] [2021-06-05 17:04:17,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65635765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:17,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987465917] [2021-06-05 17:04:17,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:17,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:17,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:17,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:17,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:17,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:17,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987465917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:17,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:17,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:04:17,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588795607] [2021-06-05 17:04:17,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:04:17,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:17,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:04:17,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:04:17,567 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:17,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:17,964 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-05 17:04:17,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 17:04:17,964 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:17,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:17,969 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 17:04:17,969 INFO L226 Difference]: Without dead ends: 1492 [2021-06-05 17:04:17,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 231.6ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 17:04:17,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-05 17:04:17,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-05 17:04:17,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:17,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-05 17:04:17,984 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-05 17:04:17,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:17,984 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-05 17:04:17,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:17,985 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-05 17:04:17,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:17,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:17,985 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:18,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 17:04:18,190 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:18,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:18,191 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-06-05 17:04:18,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:18,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418869772] [2021-06-05 17:04:18,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:18,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:18,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418869772] [2021-06-05 17:04:18,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418869772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:18,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643861406] [2021-06-05 17:04:18,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:18,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:18,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:18,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:18,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:18,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643861406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:18,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:18,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 17:04:18,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521981206] [2021-06-05 17:04:18,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:18,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:18,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:18,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:18,333 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:18,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:18,547 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-05 17:04:18,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:04:18,548 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:18,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:18,552 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 17:04:18,552 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 17:04:18,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:04:18,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 17:04:18,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-05 17:04:18,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:18,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-05 17:04:18,566 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-05 17:04:18,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:18,566 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-05 17:04:18,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:18,566 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-05 17:04:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:18,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:18,568 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:18,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:18,781 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:18,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:18,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-06-05 17:04:18,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:18,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340658819] [2021-06-05 17:04:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:18,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:18,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340658819] [2021-06-05 17:04:18,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340658819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:18,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296238971] [2021-06-05 17:04:18,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:18,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:04:18,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:18,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:18,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:18,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296238971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:18,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:18,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 17:04:18,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333005298] [2021-06-05 17:04:18,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:18,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:18,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:18,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:18,902 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:19,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:19,138 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-05 17:04:19,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 17:04:19,138 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:19,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:19,142 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 17:04:19,142 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 17:04:19,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:04:19,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 17:04:19,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-05 17:04:19,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:19,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-05 17:04:19,156 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-05 17:04:19,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:19,157 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-05 17:04:19,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:19,157 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-05 17:04:19,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:19,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:19,158 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:19,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:19,373 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:19,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:19,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-06-05 17:04:19,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:19,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783791711] [2021-06-05 17:04:19,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:19,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:19,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783791711] [2021-06-05 17:04:19,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783791711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:19,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457394230] [2021-06-05 17:04:19,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:19,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:19,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:19,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457394230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:19,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:19,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:04:19,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500408485] [2021-06-05 17:04:19,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:04:19,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:19,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:04:19,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:04:19,492 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:19,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:19,814 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-05 17:04:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:04:19,814 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:19,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:19,819 INFO L225 Difference]: With dead ends: 1548 [2021-06-05 17:04:19,819 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 17:04:19,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:04:19,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 17:04:19,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-05 17:04:19,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-05 17:04:19,835 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-05 17:04:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:19,835 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-05 17:04:19,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-05 17:04:19,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:19,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:19,837 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:20,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 17:04:20,050 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:20,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:20,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-06-05 17:04:20,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:20,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915462230] [2021-06-05 17:04:20,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:20,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:20,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915462230] [2021-06-05 17:04:20,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915462230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:20,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767125451] [2021-06-05 17:04:20,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:20,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:20,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:20,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:20,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:20,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767125451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:20,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:20,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:04:20,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034564400] [2021-06-05 17:04:20,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:20,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:20,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:20,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:20,198 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:20,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:20,904 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-05 17:04:20,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:04:20,905 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:20,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:20,913 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 17:04:20,913 INFO L226 Difference]: Without dead ends: 2734 [2021-06-05 17:04:20,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 424.3ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:04:20,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-05 17:04:20,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-05 17:04:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:20,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-05 17:04:20,937 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-05 17:04:20,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:20,937 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-05 17:04:20,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:20,937 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-05 17:04:20,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:20,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:20,938 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:21,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:21,153 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:21,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:21,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-06-05 17:04:21,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:21,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233928550] [2021-06-05 17:04:21,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:21,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:21,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233928550] [2021-06-05 17:04:21,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233928550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:21,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033449391] [2021-06-05 17:04:21,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:21,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:04:21,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:21,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:21,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:21,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033449391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:21,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:21,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:04:21,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587109347] [2021-06-05 17:04:21,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:21,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:21,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:21,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:21,303 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:21,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:21,962 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-05 17:04:21,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:04:21,963 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:21,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:21,968 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 17:04:21,968 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 17:04:21,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 418.7ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:04:21,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 17:04:21,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-05 17:04:21,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:21,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-05 17:04:21,991 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-05 17:04:21,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:21,992 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-05 17:04:21,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-05 17:04:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:21,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:21,993 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:22,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 17:04:22,209 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:22,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:22,209 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-06-05 17:04:22,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:22,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449370448] [2021-06-05 17:04:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:22,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:22,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:22,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449370448] [2021-06-05 17:04:22,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449370448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:22,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360572704] [2021-06-05 17:04:22,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:22,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:22,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:22,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:22,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:22,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360572704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:22,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:22,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 17:04:22,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187256951] [2021-06-05 17:04:22,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:04:22,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:22,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:04:22,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:04:22,349 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:22,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:22,937 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-05 17:04:22,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:04:22,938 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:22,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:22,947 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 17:04:22,947 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 17:04:22,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 352.5ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:04:22,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 17:04:22,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-05 17:04:22,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:22,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-05 17:04:22,972 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-05 17:04:22,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:22,973 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-05 17:04:22,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:22,973 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-05 17:04:22,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:22,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:22,974 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:23,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 17:04:23,189 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:23,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:23,189 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-06-05 17:04:23,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:23,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064188899] [2021-06-05 17:04:23,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:23,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:23,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064188899] [2021-06-05 17:04:23,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064188899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:23,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161308162] [2021-06-05 17:04:23,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:23,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:04:23,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:23,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:23,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:23,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161308162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:23,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:23,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 17:04:23,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655077009] [2021-06-05 17:04:23,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:04:23,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:23,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:04:23,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:04:23,326 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:23,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:23,809 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-05 17:04:23,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 17:04:23,809 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:23,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:23,813 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 17:04:23,814 INFO L226 Difference]: Without dead ends: 2470 [2021-06-05 17:04:23,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 284.5ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:04:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-05 17:04:23,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-05 17:04:23,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:23,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-05 17:04:23,836 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-05 17:04:23,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:23,837 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-05 17:04:23,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:23,837 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-05 17:04:23,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:23,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:23,838 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:24,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 17:04:24,048 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:24,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:24,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-06-05 17:04:24,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:24,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24927710] [2021-06-05 17:04:24,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:24,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:24,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24927710] [2021-06-05 17:04:24,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24927710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:24,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957557791] [2021-06-05 17:04:24,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:24,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:04:24,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:24,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:24,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:24,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957557791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:24,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:24,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:04:24,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908665643] [2021-06-05 17:04:24,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:24,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:24,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:24,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:24,206 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:24,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:24,805 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-05 17:04:24,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 17:04:24,810 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:24,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:24,815 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 17:04:24,815 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 17:04:24,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 369.0ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:04:24,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 17:04:24,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-05 17:04:24,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-05 17:04:24,838 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-05 17:04:24,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:24,838 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-05 17:04:24,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:24,838 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-05 17:04:24,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:24,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:24,840 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:25,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 17:04:25,049 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:25,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:25,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-06-05 17:04:25,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:25,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553833279] [2021-06-05 17:04:25,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:25,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:25,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553833279] [2021-06-05 17:04:25,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553833279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:25,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220210152] [2021-06-05 17:04:25,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:25,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:25,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:25,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220210152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:25,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:25,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:04:25,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995081361] [2021-06-05 17:04:25,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:25,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:25,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:25,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:25,194 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:25,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:25,786 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-05 17:04:25,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:04:25,786 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:25,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:25,790 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 17:04:25,790 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 17:04:25,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 327.5ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:04:25,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 17:04:25,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-05 17:04:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:25,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-05 17:04:25,811 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-05 17:04:25,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:25,811 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-05 17:04:25,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-05 17:04:25,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:25,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:25,813 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:26,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 17:04:26,021 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:26,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:26,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-06-05 17:04:26,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:26,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130258656] [2021-06-05 17:04:26,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:04:26,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:26,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130258656] [2021-06-05 17:04:26,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130258656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:26,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436587383] [2021-06-05 17:04:26,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:26,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:04:26,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:26,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 17:04:26,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:04:26,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436587383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:26,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:26,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 17:04:26,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082518490] [2021-06-05 17:04:26,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:04:26,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:26,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:04:26,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:04:26,112 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:26,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:26,174 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-05 17:04:26,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:04:26,178 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:26,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:26,180 INFO L225 Difference]: With dead ends: 929 [2021-06-05 17:04:26,180 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 17:04:26,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:04:26,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 17:04:26,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-05 17:04:26,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:26,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-05 17:04:26,191 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-05 17:04:26,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:26,191 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-05 17:04:26,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:26,191 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-05 17:04:26,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:26,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:26,193 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:26,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:26,409 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:26,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:26,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-06-05 17:04:26,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:26,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145601521] [2021-06-05 17:04:26,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:26,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:26,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145601521] [2021-06-05 17:04:26,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145601521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:26,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581772088] [2021-06-05 17:04:26,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:26,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:26,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:26,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:26,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:26,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581772088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:26,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:26,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 17:04:26,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775473969] [2021-06-05 17:04:26,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:04:26,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:26,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:04:26,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:04:26,512 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:26,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:26,769 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-05 17:04:26,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:04:26,769 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:26,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:26,771 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 17:04:26,771 INFO L226 Difference]: Without dead ends: 1555 [2021-06-05 17:04:26,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:04:26,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-05 17:04:26,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-05 17:04:26,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:26,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-05 17:04:26,786 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-05 17:04:26,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:26,787 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-05 17:04:26,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:26,787 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-05 17:04:26,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:26,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:26,788 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:27,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 17:04:27,001 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:27,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:27,001 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-06-05 17:04:27,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:27,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016773579] [2021-06-05 17:04:27,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:27,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:27,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016773579] [2021-06-05 17:04:27,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016773579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:27,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930896444] [2021-06-05 17:04:27,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:27,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:04:27,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:27,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:27,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:27,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930896444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:27,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:27,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 17:04:27,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765405160] [2021-06-05 17:04:27,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:04:27,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:27,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:04:27,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:04:27,124 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:27,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:27,322 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-05 17:04:27,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:04:27,323 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:27,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:27,325 INFO L225 Difference]: With dead ends: 1605 [2021-06-05 17:04:27,325 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 17:04:27,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:04:27,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 17:04:27,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-05 17:04:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:27,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-05 17:04:27,340 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-05 17:04:27,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:27,340 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-05 17:04:27,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:27,340 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-05 17:04:27,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:27,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:27,342 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:27,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:27,557 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:27,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:27,557 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-06-05 17:04:27,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:27,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562624211] [2021-06-05 17:04:27,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:04:27,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:27,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562624211] [2021-06-05 17:04:27,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562624211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:27,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400948308] [2021-06-05 17:04:27,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:27,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:27,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:27,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:27,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:04:27,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400948308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:27,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:27,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 17:04:27,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482599429] [2021-06-05 17:04:27,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:04:27,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:27,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:04:27,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:04:27,641 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:27,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:27,805 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-05 17:04:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:04:27,805 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:27,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:27,807 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 17:04:27,807 INFO L226 Difference]: Without dead ends: 1520 [2021-06-05 17:04:27,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:04:27,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-05 17:04:27,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-05 17:04:27,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-05 17:04:27,821 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-05 17:04:27,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:27,821 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-05 17:04:27,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:27,821 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-05 17:04:27,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:27,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:27,822 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:28,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 17:04:28,031 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:28,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:28,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-06-05 17:04:28,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:28,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649176691] [2021-06-05 17:04:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:28,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:28,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649176691] [2021-06-05 17:04:28,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649176691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:28,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101632924] [2021-06-05 17:04:28,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:28,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:04:28,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:28,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:28,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:28,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101632924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:28,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:28,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 17:04:28,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54393539] [2021-06-05 17:04:28,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:04:28,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:28,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:04:28,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:04:28,119 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:28,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:28,322 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-05 17:04:28,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:04:28,323 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:28,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:28,324 INFO L225 Difference]: With dead ends: 1508 [2021-06-05 17:04:28,324 INFO L226 Difference]: Without dead ends: 1496 [2021-06-05 17:04:28,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:04:28,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-05 17:04:28,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-05 17:04:28,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:28,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-05 17:04:28,337 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-05 17:04:28,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:28,337 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-05 17:04:28,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:28,338 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-05 17:04:28,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:28,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:28,339 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:28,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:28,543 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:28,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:28,543 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-06-05 17:04:28,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:28,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522590110] [2021-06-05 17:04:28,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:28,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:28,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522590110] [2021-06-05 17:04:28,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522590110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:28,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967953516] [2021-06-05 17:04:28,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:28,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:04:28,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:28,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:28,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:28,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967953516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:28,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:28,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:04:28,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962246956] [2021-06-05 17:04:28,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:28,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:28,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:28,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:28,693 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:29,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:29,109 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-05 17:04:29,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 17:04:29,110 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:29,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:29,113 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 17:04:29,113 INFO L226 Difference]: Without dead ends: 2412 [2021-06-05 17:04:29,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:04:29,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-05 17:04:29,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-05 17:04:29,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-05 17:04:29,131 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-05 17:04:29,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:29,131 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-05 17:04:29,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:29,131 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-05 17:04:29,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:29,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:29,133 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:29,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 17:04:29,345 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:29,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:29,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-06-05 17:04:29,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:29,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856832282] [2021-06-05 17:04:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:29,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:29,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856832282] [2021-06-05 17:04:29,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856832282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:29,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978850906] [2021-06-05 17:04:29,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:29,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:29,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:29,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978850906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:29,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:29,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:04:29,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409445600] [2021-06-05 17:04:29,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:29,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:29,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:29,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:29,486 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:29,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:29,919 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-05 17:04:29,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 17:04:29,920 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:29,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:29,922 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 17:04:29,922 INFO L226 Difference]: Without dead ends: 2335 [2021-06-05 17:04:29,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:04:29,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-05 17:04:29,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-05 17:04:29,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:29,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 17:04:29,941 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 17:04:29,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:29,941 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 17:04:29,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:29,941 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 17:04:29,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:29,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:29,943 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:30,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:30,157 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:30,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:30,157 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-06-05 17:04:30,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:30,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348261734] [2021-06-05 17:04:30,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:30,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:30,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348261734] [2021-06-05 17:04:30,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348261734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:30,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115020631] [2021-06-05 17:04:30,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:30,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:30,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:30,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:30,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:30,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115020631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:30,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:30,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 17:04:30,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146678635] [2021-06-05 17:04:30,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:04:30,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:30,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:04:30,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:04:30,282 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:30,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:30,648 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-05 17:04:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 17:04:30,648 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:30,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:30,651 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 17:04:30,651 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 17:04:30,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 240.7ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:04:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 17:04:30,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-05 17:04:30,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 17:04:30,668 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 17:04:30,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:30,668 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 17:04:30,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:30,669 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 17:04:30,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:30,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:30,670 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:30,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 17:04:30,889 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:30,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:30,889 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-06-05 17:04:30,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:30,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613395706] [2021-06-05 17:04:30,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:30,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:30,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613395706] [2021-06-05 17:04:30,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613395706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:30,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994973435] [2021-06-05 17:04:30,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:30,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:04:30,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:30,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:30,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:30,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994973435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:30,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:30,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 17:04:30,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039525518] [2021-06-05 17:04:30,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:04:30,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:30,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:04:30,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:04:31,000 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:31,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:31,307 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-05 17:04:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:04:31,307 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:31,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:31,310 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 17:04:31,310 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 17:04:31,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:04:31,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 17:04:31,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-05 17:04:31,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:31,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 17:04:31,326 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 17:04:31,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:31,326 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 17:04:31,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:31,327 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 17:04:31,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:31,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:31,328 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:31,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:31,537 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:31,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:31,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-06-05 17:04:31,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:31,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548522660] [2021-06-05 17:04:31,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:31,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:31,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548522660] [2021-06-05 17:04:31,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548522660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:31,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644110032] [2021-06-05 17:04:31,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:31,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:31,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:31,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:31,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:31,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644110032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:31,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:31,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:04:31,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061144049] [2021-06-05 17:04:31,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:31,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:31,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:31,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:31,675 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:32,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:32,000 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-05 17:04:32,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:04:32,004 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:32,007 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 17:04:32,007 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 17:04:32,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 224.9ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:04:32,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 17:04:32,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-05 17:04:32,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:32,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 17:04:32,026 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 17:04:32,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:32,026 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 17:04:32,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:32,026 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 17:04:32,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:32,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:32,027 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:32,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 17:04:32,241 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:32,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:32,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-06-05 17:04:32,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:32,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642387241] [2021-06-05 17:04:32,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:32,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:32,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:32,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642387241] [2021-06-05 17:04:32,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642387241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:32,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917086929] [2021-06-05 17:04:32,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:32,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:04:32,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:32,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:32,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:32,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917086929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:32,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:32,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:04:32,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664854327] [2021-06-05 17:04:32,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:32,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:32,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:32,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:32,366 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:32,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:32,688 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-05 17:04:32,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:04:32,689 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:32,691 INFO L225 Difference]: With dead ends: 2156 [2021-06-05 17:04:32,691 INFO L226 Difference]: Without dead ends: 2152 [2021-06-05 17:04:32,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 200.4ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 17:04:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-05 17:04:32,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-05 17:04:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:32,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 17:04:32,708 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 17:04:32,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:32,709 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 17:04:32,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:32,709 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 17:04:32,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:32,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:32,710 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:32,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 17:04:32,923 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:32,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:32,923 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-06-05 17:04:32,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:32,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249823453] [2021-06-05 17:04:32,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:32,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:32,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249823453] [2021-06-05 17:04:32,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249823453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:32,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619509796] [2021-06-05 17:04:32,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:32,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:04:32,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:32,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:32,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:33,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619509796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:33,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:33,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:04:33,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928610886] [2021-06-05 17:04:33,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:04:33,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:33,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:04:33,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:04:33,025 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:33,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:33,328 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-05 17:04:33,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:04:33,329 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:33,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:33,331 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 17:04:33,331 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 17:04:33,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 180.4ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:04:33,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 17:04:33,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-05 17:04:33,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-05 17:04:33,348 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-05 17:04:33,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:33,348 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-05 17:04:33,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:33,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-05 17:04:33,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:33,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:33,349 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:33,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 17:04:33,550 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:33,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:33,550 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-06-05 17:04:33,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:33,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024964749] [2021-06-05 17:04:33,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:33,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:33,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024964749] [2021-06-05 17:04:33,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024964749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:33,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203096973] [2021-06-05 17:04:33,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:33,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:33,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:33,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203096973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:33,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:33,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:04:33,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300994225] [2021-06-05 17:04:33,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:04:33,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:33,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:04:33,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:04:33,675 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:33,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:33,919 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-05 17:04:33,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:04:33,919 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:33,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:33,921 INFO L225 Difference]: With dead ends: 1963 [2021-06-05 17:04:33,921 INFO L226 Difference]: Without dead ends: 1959 [2021-06-05 17:04:33,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:04:33,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-05 17:04:33,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-05 17:04:33,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:33,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-05 17:04:33,937 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-05 17:04:33,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:33,938 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-05 17:04:33,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:33,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-05 17:04:33,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:33,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:33,939 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:34,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 17:04:34,153 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:34,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:34,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-06-05 17:04:34,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:34,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152316257] [2021-06-05 17:04:34,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:34,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:34,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152316257] [2021-06-05 17:04:34,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152316257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:34,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689355693] [2021-06-05 17:04:34,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:34,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:34,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:34,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:34,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:34,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689355693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:34,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:34,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:04:34,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921177937] [2021-06-05 17:04:34,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:04:34,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:34,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:04:34,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:04:34,254 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:34,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:34,439 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-05 17:04:34,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:04:34,440 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:34,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:34,442 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 17:04:34,442 INFO L226 Difference]: Without dead ends: 1716 [2021-06-05 17:04:34,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:04:34,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-05 17:04:34,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-05 17:04:34,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:34,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-05 17:04:34,456 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-05 17:04:34,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:34,456 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-05 17:04:34,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:34,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-05 17:04:34,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:34,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:34,457 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:34,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:34,659 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:34,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:34,659 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-06-05 17:04:34,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:34,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812622139] [2021-06-05 17:04:34,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:34,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:34,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812622139] [2021-06-05 17:04:34,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812622139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:34,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433381967] [2021-06-05 17:04:34,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:34,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:04:34,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:34,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:34,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:34,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433381967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:34,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:34,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:04:34,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551170183] [2021-06-05 17:04:34,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:34,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:34,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:34,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:34,790 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:35,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:35,109 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-05 17:04:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:04:35,109 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:35,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:35,111 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 17:04:35,111 INFO L226 Difference]: Without dead ends: 1821 [2021-06-05 17:04:35,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 199.5ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 17:04:35,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-05 17:04:35,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-05 17:04:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:35,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-05 17:04:35,127 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-05 17:04:35,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:35,127 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-05 17:04:35,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:35,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-05 17:04:35,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:35,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:35,128 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:35,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 17:04:35,341 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:35,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:35,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-06-05 17:04:35,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:35,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226336243] [2021-06-05 17:04:35,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:35,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:35,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226336243] [2021-06-05 17:04:35,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226336243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:35,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533952727] [2021-06-05 17:04:35,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:35,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:35,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:35,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:35,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:35,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533952727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:35,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:35,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:04:35,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473715141] [2021-06-05 17:04:35,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:35,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:35,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:35,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:35,465 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:35,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:35,727 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-05 17:04:35,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 17:04:35,728 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:35,730 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 17:04:35,730 INFO L226 Difference]: Without dead ends: 1786 [2021-06-05 17:04:35,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:04:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-05 17:04:35,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-05 17:04:35,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:35,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-05 17:04:35,746 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-05 17:04:35,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:35,746 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-05 17:04:35,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:35,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-05 17:04:35,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:04:35,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:35,747 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:35,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 17:04:35,948 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:35,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:35,948 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-06-05 17:04:35,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:35,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596154156] [2021-06-05 17:04:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:35,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:35,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596154156] [2021-06-05 17:04:35,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596154156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:35,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113353050] [2021-06-05 17:04:35,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:35,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:04:36,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:36,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:04:36,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:36,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113353050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:36,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:36,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 17:04:36,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920358351] [2021-06-05 17:04:36,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:04:36,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:36,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:04:36,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:04:36,060 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:36,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:36,205 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-05 17:04:36,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:04:36,206 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:04:36,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:36,208 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 17:04:36,208 INFO L226 Difference]: Without dead ends: 1637 [2021-06-05 17:04:36,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:04:36,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-05 17:04:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-05 17:04:36,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:36,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-05 17:04:36,224 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-05 17:04:36,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:36,224 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-05 17:04:36,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:36,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-05 17:04:36,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:36,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:36,226 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:36,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:36,427 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:36,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:36,427 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-06-05 17:04:36,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:36,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105843861] [2021-06-05 17:04:36,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:36,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:36,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105843861] [2021-06-05 17:04:36,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105843861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:36,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689384669] [2021-06-05 17:04:36,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:36,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:36,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:36,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 17:04:36,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:36,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:36,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:36,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 17:04:36,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:36,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:36,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:36,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 17:04:36,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:36,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689384669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:36,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:36,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:04:36,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074373714] [2021-06-05 17:04:36,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:04:36,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:36,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:04:36,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:04:36,910 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:37,393 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-05 17:04:37,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:04:37,393 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:04:37,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:37,396 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 17:04:37,396 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 17:04:37,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 554.9ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:04:37,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 17:04:37,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-05 17:04:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:37,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-05 17:04:37,412 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-05 17:04:37,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:37,412 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-05 17:04:37,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:37,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-05 17:04:37,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:37,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:37,414 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:37,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 17:04:37,629 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:37,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:37,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-06-05 17:04:37,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:37,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253044499] [2021-06-05 17:04:37,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:37,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:37,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253044499] [2021-06-05 17:04:37,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253044499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:37,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095938605] [2021-06-05 17:04:37,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:37,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:04:37,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:37,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 17:04:37,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:38,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:38,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:38,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 17:04:38,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:38,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:38,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:38,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 17:04:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:38,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095938605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:38,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:38,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:04:38,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709645954] [2021-06-05 17:04:38,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:04:38,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:38,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:04:38,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:04:38,049 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:38,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:38,510 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-06-05 17:04:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:04:38,510 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:04:38,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:38,512 INFO L225 Difference]: With dead ends: 1495 [2021-06-05 17:04:38,512 INFO L226 Difference]: Without dead ends: 1480 [2021-06-05 17:04:38,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 502.3ms TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:04:38,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-06-05 17:04:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-06-05 17:04:38,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:38,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-05 17:04:38,526 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-05 17:04:38,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:38,526 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-05 17:04:38,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:38,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-05 17:04:38,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:38,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:38,527 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:38,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:38,734 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:38,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:38,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-06-05 17:04:38,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:38,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041599946] [2021-06-05 17:04:38,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:39,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:39,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041599946] [2021-06-05 17:04:39,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041599946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:39,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666460188] [2021-06-05 17:04:39,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:39,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:04:39,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:39,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:04:39,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:39,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:39,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:39,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:39,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:39,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 17:04:39,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:39,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:39,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:39,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 17:04:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:39,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666460188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:39,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:39,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 17:04:39,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972029530] [2021-06-05 17:04:39,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:04:39,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:39,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:04:39,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:04:39,245 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:41,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:41,185 INFO L93 Difference]: Finished difference Result 1658 states and 5345 transitions. [2021-06-05 17:04:41,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:04:41,185 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:04:41,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:41,187 INFO L225 Difference]: With dead ends: 1658 [2021-06-05 17:04:41,187 INFO L226 Difference]: Without dead ends: 1643 [2021-06-05 17:04:41,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1776.0ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:04:41,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-06-05 17:04:41,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1180. [2021-06-05 17:04:41,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:41,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-05 17:04:41,203 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-05 17:04:41,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:41,203 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-05 17:04:41,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:41,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-05 17:04:41,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:41,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:41,205 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:41,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 17:04:41,405 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:41,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:41,406 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-06-05 17:04:41,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:41,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273174653] [2021-06-05 17:04:41,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:41,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:41,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273174653] [2021-06-05 17:04:41,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273174653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:41,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070675669] [2021-06-05 17:04:41,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:41,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:04:41,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:41,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 17:04:41,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:41,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:41,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:41,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 17:04:41,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:41,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:41,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:41,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 17:04:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:41,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070675669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:41,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:41,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:04:41,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508168066] [2021-06-05 17:04:41,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:04:41,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:41,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:04:41,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:04:41,813 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:42,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:42,610 INFO L93 Difference]: Finished difference Result 1641 states and 5247 transitions. [2021-06-05 17:04:42,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:04:42,611 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:04:42,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:42,613 INFO L225 Difference]: With dead ends: 1641 [2021-06-05 17:04:42,613 INFO L226 Difference]: Without dead ends: 1626 [2021-06-05 17:04:42,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 708.2ms TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:04:42,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-06-05 17:04:42,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1189. [2021-06-05 17:04:42,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.3383838383838382) internal successors, (3966), 1188 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:42,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3966 transitions. [2021-06-05 17:04:42,627 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3966 transitions. Word has length 26 [2021-06-05 17:04:42,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:42,627 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3966 transitions. [2021-06-05 17:04:42,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:42,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3966 transitions. [2021-06-05 17:04:42,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:42,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:42,629 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:42,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:42,830 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:42,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:42,830 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-06-05 17:04:42,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:42,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585984082] [2021-06-05 17:04:42,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:43,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:43,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585984082] [2021-06-05 17:04:43,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585984082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:43,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625802301] [2021-06-05 17:04:43,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:43,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:04:43,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:43,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:43,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:43,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:43,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:43,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 17:04:43,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:43,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:43,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:43,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 17:04:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:43,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625802301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:43,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:43,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 17:04:43,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708479069] [2021-06-05 17:04:43,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:04:43,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:43,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:04:43,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:04:43,275 INFO L87 Difference]: Start difference. First operand 1189 states and 3966 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:45,122 INFO L93 Difference]: Finished difference Result 1880 states and 5988 transitions. [2021-06-05 17:04:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 17:04:45,123 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:04:45,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:45,125 INFO L225 Difference]: With dead ends: 1880 [2021-06-05 17:04:45,125 INFO L226 Difference]: Without dead ends: 1865 [2021-06-05 17:04:45,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1769.3ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:04:45,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2021-06-05 17:04:45,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1201. [2021-06-05 17:04:45,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.3466666666666667) internal successors, (4016), 1200 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:45,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 4016 transitions. [2021-06-05 17:04:45,146 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 4016 transitions. Word has length 26 [2021-06-05 17:04:45,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:45,146 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 4016 transitions. [2021-06-05 17:04:45,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:45,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 4016 transitions. [2021-06-05 17:04:45,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:45,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:45,148 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:45,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 17:04:45,348 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:45,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:45,348 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-06-05 17:04:45,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:45,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176252989] [2021-06-05 17:04:45,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:45,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:45,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176252989] [2021-06-05 17:04:45,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176252989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:45,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324961360] [2021-06-05 17:04:45,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:45,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:45,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:45,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 17:04:45,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:45,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:45,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:45,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:45,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 17:04:45,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:04:45,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:45,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:45,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:38 [2021-06-05 17:04:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:45,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324961360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:45,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:45,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 17:04:45,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801991095] [2021-06-05 17:04:45,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:04:45,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:45,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:04:45,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:04:45,879 INFO L87 Difference]: Start difference. First operand 1201 states and 4016 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:47,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:47,269 INFO L93 Difference]: Finished difference Result 2084 states and 6623 transitions. [2021-06-05 17:04:47,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:04:47,270 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:04:47,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:47,273 INFO L225 Difference]: With dead ends: 2084 [2021-06-05 17:04:47,273 INFO L226 Difference]: Without dead ends: 2069 [2021-06-05 17:04:47,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1257.3ms TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:04:47,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-06-05 17:04:47,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1211. [2021-06-05 17:04:47,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 3.3446280991735535) internal successors, (4047), 1210 states have internal predecessors, (4047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:47,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 4047 transitions. [2021-06-05 17:04:47,295 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 4047 transitions. Word has length 26 [2021-06-05 17:04:47,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:47,295 INFO L482 AbstractCegarLoop]: Abstraction has 1211 states and 4047 transitions. [2021-06-05 17:04:47,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:47,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 4047 transitions. [2021-06-05 17:04:47,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:47,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:47,297 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:47,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 17:04:47,497 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:47,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:47,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-06-05 17:04:47,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:47,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618101052] [2021-06-05 17:04:47,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:47,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:47,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618101052] [2021-06-05 17:04:47,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618101052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:47,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304874766] [2021-06-05 17:04:47,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 17:04:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:47,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 17:04:47,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:47,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:47,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:47,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 17:04:47,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:47,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:47,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:47,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 17:04:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:47,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304874766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:47,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:47,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:04:47,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137861437] [2021-06-05 17:04:47,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:04:47,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:47,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:04:47,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:04:47,864 INFO L87 Difference]: Start difference. First operand 1211 states and 4047 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:48,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:48,437 INFO L93 Difference]: Finished difference Result 1614 states and 5256 transitions. [2021-06-05 17:04:48,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 17:04:48,438 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:04:48,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:48,440 INFO L225 Difference]: With dead ends: 1614 [2021-06-05 17:04:48,440 INFO L226 Difference]: Without dead ends: 1599 [2021-06-05 17:04:48,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 544.4ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:04:48,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-06-05 17:04:48,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1222. [2021-06-05 17:04:48,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.3415233415233416) internal successors, (4080), 1221 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:48,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4080 transitions. [2021-06-05 17:04:48,454 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4080 transitions. Word has length 26 [2021-06-05 17:04:48,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:48,454 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 4080 transitions. [2021-06-05 17:04:48,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:48,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4080 transitions. [2021-06-05 17:04:48,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:48,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:48,456 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:48,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 17:04:48,657 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:48,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:48,657 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-06-05 17:04:48,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:48,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480170527] [2021-06-05 17:04:48,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:48,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:48,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480170527] [2021-06-05 17:04:48,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480170527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:48,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826783526] [2021-06-05 17:04:48,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 17:04:48,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:48,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:48,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 17:04:48,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:49,029 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 17:04:49,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 64 [2021-06-05 17:04:49,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:49,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:49,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:49,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:105 [2021-06-05 17:04:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:49,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826783526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:49,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:49,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:04:49,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756057893] [2021-06-05 17:04:49,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:04:49,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:49,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:04:49,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:04:49,163 INFO L87 Difference]: Start difference. First operand 1222 states and 4080 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:50,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:50,858 INFO L93 Difference]: Finished difference Result 1877 states and 5972 transitions. [2021-06-05 17:04:50,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:04:50,858 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:04:50,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:50,861 INFO L225 Difference]: With dead ends: 1877 [2021-06-05 17:04:50,861 INFO L226 Difference]: Without dead ends: 1862 [2021-06-05 17:04:50,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1429.9ms TimeCoverageRelationStatistics Valid=313, Invalid=1757, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:04:50,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-06-05 17:04:50,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1233. [2021-06-05 17:04:50,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 3.3506493506493507) internal successors, (4128), 1232 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:50,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 4128 transitions. [2021-06-05 17:04:50,878 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 4128 transitions. Word has length 26 [2021-06-05 17:04:50,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:50,878 INFO L482 AbstractCegarLoop]: Abstraction has 1233 states and 4128 transitions. [2021-06-05 17:04:50,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:50,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 4128 transitions. [2021-06-05 17:04:50,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:50,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:50,880 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:51,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 17:04:51,081 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:51,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:51,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-06-05 17:04:51,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:51,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871765995] [2021-06-05 17:04:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:51,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:51,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871765995] [2021-06-05 17:04:51,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871765995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:51,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510940533] [2021-06-05 17:04:51,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:51,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:04:51,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:51,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:04:51,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:51,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:51,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:51,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 17:04:51,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:51,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:51,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:51,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 17:04:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:51,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510940533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:51,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:51,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:04:51,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301633949] [2021-06-05 17:04:51,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:04:51,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:51,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:04:51,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:04:51,529 INFO L87 Difference]: Start difference. First operand 1233 states and 4128 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:52,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:52,414 INFO L93 Difference]: Finished difference Result 1868 states and 6061 transitions. [2021-06-05 17:04:52,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 17:04:52,414 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:04:52,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:52,416 INFO L225 Difference]: With dead ends: 1868 [2021-06-05 17:04:52,416 INFO L226 Difference]: Without dead ends: 1853 [2021-06-05 17:04:52,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 714.8ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-05 17:04:52,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-06-05 17:04:52,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1242. [2021-06-05 17:04:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 3.35535858178888) internal successors, (4164), 1241 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:52,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 4164 transitions. [2021-06-05 17:04:52,433 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 4164 transitions. Word has length 26 [2021-06-05 17:04:52,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:52,433 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 4164 transitions. [2021-06-05 17:04:52,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:52,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 4164 transitions. [2021-06-05 17:04:52,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:52,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:52,435 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:52,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:52,635 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:52,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:52,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-06-05 17:04:52,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:52,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502415003] [2021-06-05 17:04:52,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:52,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:52,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502415003] [2021-06-05 17:04:52,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502415003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:52,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774255030] [2021-06-05 17:04:52,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:52,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:52,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:52,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:04:52,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:52,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:52,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:52,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 17:04:52,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:52,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:52,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:52,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 17:04:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:52,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774255030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:52,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:52,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 17:04:52,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488050625] [2021-06-05 17:04:52,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:04:52,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:52,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:04:52,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:04:52,963 INFO L87 Difference]: Start difference. First operand 1242 states and 4164 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:53,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:53,275 INFO L93 Difference]: Finished difference Result 1425 states and 4676 transitions. [2021-06-05 17:04:53,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:04:53,276 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:04:53,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:53,277 INFO L225 Difference]: With dead ends: 1425 [2021-06-05 17:04:53,277 INFO L226 Difference]: Without dead ends: 1410 [2021-06-05 17:04:53,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 319.3ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:04:53,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-06-05 17:04:53,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1238. [2021-06-05 17:04:53,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.354890864995958) internal successors, (4150), 1237 states have internal predecessors, (4150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:53,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4150 transitions. [2021-06-05 17:04:53,291 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4150 transitions. Word has length 26 [2021-06-05 17:04:53,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:53,292 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4150 transitions. [2021-06-05 17:04:53,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:53,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4150 transitions. [2021-06-05 17:04:53,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:53,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:53,293 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:53,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:53,495 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:53,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:53,496 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-06-05 17:04:53,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:53,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560040614] [2021-06-05 17:04:53,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:53,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:53,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560040614] [2021-06-05 17:04:53,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560040614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:53,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862160204] [2021-06-05 17:04:53,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:53,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:04:53,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:53,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:04:53,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:53,829 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 17:04:53,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-05 17:04:53,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:53,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:53,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:53,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:21 [2021-06-05 17:04:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:53,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862160204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:53,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:53,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:04:53,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536694213] [2021-06-05 17:04:53,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:04:53,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:53,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:04:53,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:04:53,904 INFO L87 Difference]: Start difference. First operand 1238 states and 4150 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:55,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:55,120 INFO L93 Difference]: Finished difference Result 2068 states and 6701 transitions. [2021-06-05 17:04:55,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:04:55,121 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:04:55,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:55,123 INFO L225 Difference]: With dead ends: 2068 [2021-06-05 17:04:55,123 INFO L226 Difference]: Without dead ends: 2053 [2021-06-05 17:04:55,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1019.5ms TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:04:55,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-06-05 17:04:55,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1241. [2021-06-05 17:04:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.3588709677419355) internal successors, (4165), 1240 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4165 transitions. [2021-06-05 17:04:55,141 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4165 transitions. Word has length 26 [2021-06-05 17:04:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:55,142 INFO L482 AbstractCegarLoop]: Abstraction has 1241 states and 4165 transitions. [2021-06-05 17:04:55,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4165 transitions. [2021-06-05 17:04:55,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:55,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:55,143 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:55,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 17:04:55,344 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:55,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:55,344 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 12 times [2021-06-05 17:04:55,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:55,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670342388] [2021-06-05 17:04:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:55,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:55,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:55,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670342388] [2021-06-05 17:04:55,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670342388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:55,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835800897] [2021-06-05 17:04:55,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 17:04:55,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:04:55,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:55,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:04:55,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:55,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:55,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:55,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:55,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:55,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-06-05 17:04:55,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:04:55,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:55,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:55,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-06-05 17:04:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:55,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835800897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:55,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:55,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:04:55,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639461984] [2021-06-05 17:04:55,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:04:55,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:55,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:04:55,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:04:55,698 INFO L87 Difference]: Start difference. First operand 1241 states and 4165 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:56,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:56,888 INFO L93 Difference]: Finished difference Result 1837 states and 5986 transitions. [2021-06-05 17:04:56,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:04:56,888 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:04:56,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:56,891 INFO L225 Difference]: With dead ends: 1837 [2021-06-05 17:04:56,891 INFO L226 Difference]: Without dead ends: 1822 [2021-06-05 17:04:56,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1021.7ms TimeCoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:04:56,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2021-06-05 17:04:56,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1244. [2021-06-05 17:04:56,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 3.360418342719228) internal successors, (4177), 1243 states have internal predecessors, (4177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:56,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4177 transitions. [2021-06-05 17:04:56,907 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4177 transitions. Word has length 26 [2021-06-05 17:04:56,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:56,907 INFO L482 AbstractCegarLoop]: Abstraction has 1244 states and 4177 transitions. [2021-06-05 17:04:56,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:56,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4177 transitions. [2021-06-05 17:04:56,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:56,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:56,909 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:57,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 17:04:57,110 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:57,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:57,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1212092298, now seen corresponding path program 13 times [2021-06-05 17:04:57,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:57,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200887436] [2021-06-05 17:04:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:57,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:57,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:57,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200887436] [2021-06-05 17:04:57,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200887436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:57,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623298701] [2021-06-05 17:04:57,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:57,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 17:04:57,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:57,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:57,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:57,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 17:04:57,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:57,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:57,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:57,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 17:04:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:57,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623298701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:57,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:57,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:04:57,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982409012] [2021-06-05 17:04:57,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:04:57,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:57,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:04:57,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:04:57,513 INFO L87 Difference]: Start difference. First operand 1244 states and 4177 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:58,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:58,308 INFO L93 Difference]: Finished difference Result 1881 states and 6019 transitions. [2021-06-05 17:04:58,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:04:58,308 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:04:58,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:58,310 INFO L225 Difference]: With dead ends: 1881 [2021-06-05 17:04:58,310 INFO L226 Difference]: Without dead ends: 1866 [2021-06-05 17:04:58,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 679.3ms TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2021-06-05 17:04:58,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-06-05 17:04:58,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1246. [2021-06-05 17:04:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:58,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-06-05 17:04:58,327 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-06-05 17:04:58,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:58,327 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-06-05 17:04:58,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:58,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-06-05 17:04:58,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:58,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:58,329 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:58,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:58,532 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:58,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:58,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-06-05 17:04:58,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:58,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763407896] [2021-06-05 17:04:58,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:58,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:58,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763407896] [2021-06-05 17:04:58,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763407896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:58,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658113488] [2021-06-05 17:04:58,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:58,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:04:58,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:58,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:04:58,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:58,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:58,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:58,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:58,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:58,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 17:04:58,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:58,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:58,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:58,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 17:04:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:58,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658113488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:58,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:58,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 17:04:58,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940501249] [2021-06-05 17:04:58,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:04:58,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:58,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:04:58,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:04:58,890 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:00,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:00,709 INFO L93 Difference]: Finished difference Result 2938 states and 9138 transitions. [2021-06-05 17:05:00,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:05:00,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:00,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:00,713 INFO L225 Difference]: With dead ends: 2938 [2021-06-05 17:05:00,714 INFO L226 Difference]: Without dead ends: 2893 [2021-06-05 17:05:00,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1570.8ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:05:00,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-06-05 17:05:00,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 1292. [2021-06-05 17:05:00,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.375677769171185) internal successors, (4358), 1291 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:00,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4358 transitions. [2021-06-05 17:05:00,734 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4358 transitions. Word has length 26 [2021-06-05 17:05:00,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:00,734 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4358 transitions. [2021-06-05 17:05:00,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:00,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4358 transitions. [2021-06-05 17:05:00,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:00,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:00,736 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:00,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:00,937 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:00,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:00,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1493004622, now seen corresponding path program 14 times [2021-06-05 17:05:00,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:00,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918057898] [2021-06-05 17:05:00,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:01,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:01,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918057898] [2021-06-05 17:05:01,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918057898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:01,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092284230] [2021-06-05 17:05:01,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:01,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:01,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:01,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:05:01,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:01,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:01,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:01,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 17:05:01,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:01,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:01,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:01,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:120 [2021-06-05 17:05:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:01,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092284230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:01,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:01,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:05:01,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005937459] [2021-06-05 17:05:01,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:05:01,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:01,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:05:01,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:05:01,485 INFO L87 Difference]: Start difference. First operand 1292 states and 4358 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:03,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:03,618 INFO L93 Difference]: Finished difference Result 2343 states and 7345 transitions. [2021-06-05 17:05:03,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:05:03,618 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:03,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:03,622 INFO L225 Difference]: With dead ends: 2343 [2021-06-05 17:05:03,622 INFO L226 Difference]: Without dead ends: 2313 [2021-06-05 17:05:03,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1910.1ms TimeCoverageRelationStatistics Valid=406, Invalid=1756, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:05:03,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-06-05 17:05:03,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1291. [2021-06-05 17:05:03,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1290 states have (on average 3.372093023255814) internal successors, (4350), 1290 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:03,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 4350 transitions. [2021-06-05 17:05:03,648 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 4350 transitions. Word has length 26 [2021-06-05 17:05:03,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:03,648 INFO L482 AbstractCegarLoop]: Abstraction has 1291 states and 4350 transitions. [2021-06-05 17:05:03,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:03,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 4350 transitions. [2021-06-05 17:05:03,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:03,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:03,650 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:03,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 17:05:03,861 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:03,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:03,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1417319858, now seen corresponding path program 15 times [2021-06-05 17:05:03,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:03,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910797818] [2021-06-05 17:05:03,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:04,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:04,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910797818] [2021-06-05 17:05:04,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910797818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:04,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645644233] [2021-06-05 17:05:04,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:04,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:05:04,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:04,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:05:04,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:04,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:04,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:04,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-05 17:05:04,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:05:04,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:04,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:04,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2021-06-05 17:05:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:04,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645644233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:04,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:04,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 17:05:04,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973139944] [2021-06-05 17:05:04,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:05:04,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:04,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:05:04,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:05:04,298 INFO L87 Difference]: Start difference. First operand 1291 states and 4350 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:05,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:05,867 INFO L93 Difference]: Finished difference Result 2291 states and 7285 transitions. [2021-06-05 17:05:05,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:05:05,867 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:05,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:05,871 INFO L225 Difference]: With dead ends: 2291 [2021-06-05 17:05:05,871 INFO L226 Difference]: Without dead ends: 2276 [2021-06-05 17:05:05,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1287.6ms TimeCoverageRelationStatistics Valid=355, Invalid=1451, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:05:05,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-06-05 17:05:05,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 1288. [2021-06-05 17:05:05,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.370629370629371) internal successors, (4338), 1287 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:05,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4338 transitions. [2021-06-05 17:05:05,891 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4338 transitions. Word has length 26 [2021-06-05 17:05:05,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:05,891 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4338 transitions. [2021-06-05 17:05:05,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:05,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4338 transitions. [2021-06-05 17:05:05,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:05,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:05,893 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:06,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:06,093 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:06,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:06,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-06-05 17:05:06,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:06,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975928602] [2021-06-05 17:05:06,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:06,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:06,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975928602] [2021-06-05 17:05:06,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975928602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:06,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029131321] [2021-06-05 17:05:06,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:06,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:06,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:06,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:05:06,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:06,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:06,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:06,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:06,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:06,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 17:05:06,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:06,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:06,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:06,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 17:05:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:06,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029131321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:06,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:06,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 17:05:06,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177967503] [2021-06-05 17:05:06,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:05:06,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:06,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:05:06,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:05:06,518 INFO L87 Difference]: Start difference. First operand 1288 states and 4338 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:08,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:08,208 INFO L93 Difference]: Finished difference Result 2760 states and 8712 transitions. [2021-06-05 17:05:08,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 17:05:08,208 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:08,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:08,212 INFO L225 Difference]: With dead ends: 2760 [2021-06-05 17:05:08,213 INFO L226 Difference]: Without dead ends: 2715 [2021-06-05 17:05:08,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1555.5ms TimeCoverageRelationStatistics Valid=462, Invalid=1988, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:05:08,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2021-06-05 17:05:08,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 1284. [2021-06-05 17:05:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 3.3795791114575215) internal successors, (4336), 1283 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:08,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4336 transitions. [2021-06-05 17:05:08,234 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4336 transitions. Word has length 26 [2021-06-05 17:05:08,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:08,234 INFO L482 AbstractCegarLoop]: Abstraction has 1284 states and 4336 transitions. [2021-06-05 17:05:08,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:08,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4336 transitions. [2021-06-05 17:05:08,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:08,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:08,236 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:08,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:08,441 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:08,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:08,441 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-06-05 17:05:08,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:08,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481838616] [2021-06-05 17:05:08,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:08,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:08,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:08,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481838616] [2021-06-05 17:05:08,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481838616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:08,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659852918] [2021-06-05 17:05:08,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:08,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:05:08,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:08,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 17:05:08,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:08,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:08,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:08,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:08,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-05 17:05:08,795 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:05:08,813 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-05 17:05:08,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:08,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-06-05 17:05:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:08,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659852918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:08,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:08,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 17:05:08,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233457550] [2021-06-05 17:05:08,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:05:08,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:08,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:05:08,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:05:08,868 INFO L87 Difference]: Start difference. First operand 1284 states and 4336 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:11,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:11,179 INFO L93 Difference]: Finished difference Result 3079 states and 9642 transitions. [2021-06-05 17:05:11,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:05:11,179 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:11,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:11,183 INFO L225 Difference]: With dead ends: 3079 [2021-06-05 17:05:11,183 INFO L226 Difference]: Without dead ends: 3034 [2021-06-05 17:05:11,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 1932.1ms TimeCoverageRelationStatistics Valid=623, Invalid=2457, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:05:11,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2021-06-05 17:05:11,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 1288. [2021-06-05 17:05:11,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3853923853923855) internal successors, (4357), 1287 states have internal predecessors, (4357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:11,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4357 transitions. [2021-06-05 17:05:11,206 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4357 transitions. Word has length 26 [2021-06-05 17:05:11,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:11,206 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4357 transitions. [2021-06-05 17:05:11,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:11,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4357 transitions. [2021-06-05 17:05:11,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:11,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:11,208 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:11,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:11,421 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:11,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:11,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 16 times [2021-06-05 17:05:11,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:11,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168402657] [2021-06-05 17:05:11,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:11,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:11,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168402657] [2021-06-05 17:05:11,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168402657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:11,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604368126] [2021-06-05 17:05:11,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:11,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:11,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:11,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 17:05:11,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:11,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:11,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:11,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 17:05:11,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:11,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:11,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:11,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 17:05:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:11,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604368126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:11,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:11,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:05:11,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954643236] [2021-06-05 17:05:11,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:05:11,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:11,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:05:11,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:11,792 INFO L87 Difference]: Start difference. First operand 1288 states and 4357 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:12,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:12,241 INFO L93 Difference]: Finished difference Result 1650 states and 5457 transitions. [2021-06-05 17:05:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:05:12,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:12,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:12,244 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 17:05:12,244 INFO L226 Difference]: Without dead ends: 1635 [2021-06-05 17:05:12,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 481.0ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:05:12,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-05 17:05:12,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1305. [2021-06-05 17:05:12,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 3.3803680981595092) internal successors, (4408), 1304 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:12,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 4408 transitions. [2021-06-05 17:05:12,261 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 4408 transitions. Word has length 26 [2021-06-05 17:05:12,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:12,261 INFO L482 AbstractCegarLoop]: Abstraction has 1305 states and 4408 transitions. [2021-06-05 17:05:12,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:12,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 4408 transitions. [2021-06-05 17:05:12,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:12,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:12,263 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:12,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:12,481 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:12,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1110153644, now seen corresponding path program 17 times [2021-06-05 17:05:12,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:12,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760932803] [2021-06-05 17:05:12,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:12,684 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-06-05 17:05:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:12,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:12,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760932803] [2021-06-05 17:05:12,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760932803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:12,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71022255] [2021-06-05 17:05:12,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:12,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:05:12,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:12,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 17:05:12,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:13,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:13,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:13,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 17:05:13,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:13,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:13,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:13,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 17:05:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:13,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71022255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:13,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:13,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:05:13,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647574796] [2021-06-05 17:05:13,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:05:13,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:13,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:05:13,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:05:13,042 INFO L87 Difference]: Start difference. First operand 1305 states and 4408 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:13,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:13,666 INFO L93 Difference]: Finished difference Result 1637 states and 5415 transitions. [2021-06-05 17:05:13,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:05:13,667 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:13,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:13,669 INFO L225 Difference]: With dead ends: 1637 [2021-06-05 17:05:13,669 INFO L226 Difference]: Without dead ends: 1622 [2021-06-05 17:05:13,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 805.5ms TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2021-06-05 17:05:13,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-06-05 17:05:13,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1297. [2021-06-05 17:05:13,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.385030864197531) internal successors, (4387), 1296 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-06-05 17:05:13,687 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-06-05 17:05:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:13,687 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-06-05 17:05:13,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:13,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-06-05 17:05:13,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:13,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:13,689 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:13,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-06-05 17:05:13,890 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:13,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:13,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1553655630, now seen corresponding path program 18 times [2021-06-05 17:05:13,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:13,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903147168] [2021-06-05 17:05:13,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:14,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:14,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903147168] [2021-06-05 17:05:14,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903147168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:14,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191498930] [2021-06-05 17:05:14,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:14,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:05:14,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:14,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:05:14,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:14,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:14,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:14,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 17:05:14,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:14,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:14,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:14,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 17:05:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:14,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191498930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:14,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:14,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:05:14,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632249463] [2021-06-05 17:05:14,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:05:14,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:14,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:05:14,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:14,302 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:14,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:14,979 INFO L93 Difference]: Finished difference Result 1880 states and 6175 transitions. [2021-06-05 17:05:14,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:05:14,979 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:14,982 INFO L225 Difference]: With dead ends: 1880 [2021-06-05 17:05:14,982 INFO L226 Difference]: Without dead ends: 1865 [2021-06-05 17:05:14,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 608.1ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-06-05 17:05:14,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2021-06-05 17:05:14,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1306. [2021-06-05 17:05:14,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.389272030651341) internal successors, (4423), 1305 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:14,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4423 transitions. [2021-06-05 17:05:14,999 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4423 transitions. Word has length 26 [2021-06-05 17:05:14,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:14,999 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 4423 transitions. [2021-06-05 17:05:14,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:14,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4423 transitions. [2021-06-05 17:05:15,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:15,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:15,001 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:15,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:15,202 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:15,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:15,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 19 times [2021-06-05 17:05:15,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:15,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515105848] [2021-06-05 17:05:15,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:15,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:15,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515105848] [2021-06-05 17:05:15,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515105848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:15,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268017192] [2021-06-05 17:05:15,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:15,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:05:15,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:15,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:15,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:15,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 17:05:15,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:15,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:15,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:15,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 17:05:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:15,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268017192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:15,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:15,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 17:05:15,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582602925] [2021-06-05 17:05:15,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:05:15,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:15,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:05:15,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:05:15,575 INFO L87 Difference]: Start difference. First operand 1306 states and 4423 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:15,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:15,809 INFO L93 Difference]: Finished difference Result 1472 states and 4885 transitions. [2021-06-05 17:05:15,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:05:15,810 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:15,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:15,812 INFO L225 Difference]: With dead ends: 1472 [2021-06-05 17:05:15,812 INFO L226 Difference]: Without dead ends: 1457 [2021-06-05 17:05:15,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 298.7ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:15,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2021-06-05 17:05:15,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1300. [2021-06-05 17:05:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 3.3887605850654348) internal successors, (4402), 1299 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 4402 transitions. [2021-06-05 17:05:15,828 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 4402 transitions. Word has length 26 [2021-06-05 17:05:15,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:15,828 INFO L482 AbstractCegarLoop]: Abstraction has 1300 states and 4402 transitions. [2021-06-05 17:05:15,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:15,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 4402 transitions. [2021-06-05 17:05:15,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:15,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:15,830 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:16,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 17:05:16,046 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:16,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:16,046 INFO L82 PathProgramCache]: Analyzing trace with hash 505986546, now seen corresponding path program 20 times [2021-06-05 17:05:16,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:16,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757768052] [2021-06-05 17:05:16,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:16,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:16,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757768052] [2021-06-05 17:05:16,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757768052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:16,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167992790] [2021-06-05 17:05:16,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:16,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:16,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:16,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:05:16,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:16,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:16,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:16,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 17:05:16,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:16,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:16,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:05:16,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:75 [2021-06-05 17:05:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:16,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167992790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:16,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:16,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:05:16,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858490604] [2021-06-05 17:05:16,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:05:16,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:16,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:05:16,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:16,510 INFO L87 Difference]: Start difference. First operand 1300 states and 4402 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:17,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:17,466 INFO L93 Difference]: Finished difference Result 2107 states and 6896 transitions. [2021-06-05 17:05:17,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:05:17,466 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:17,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:17,469 INFO L225 Difference]: With dead ends: 2107 [2021-06-05 17:05:17,469 INFO L226 Difference]: Without dead ends: 2092 [2021-06-05 17:05:17,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 889.8ms TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 17:05:17,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-06-05 17:05:17,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1297. [2021-06-05 17:05:17,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.385030864197531) internal successors, (4387), 1296 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:17,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-06-05 17:05:17,486 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-06-05 17:05:17,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:17,486 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-06-05 17:05:17,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:17,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-06-05 17:05:17,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:17,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:17,488 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:17,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:17,689 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:17,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:17,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 21 times [2021-06-05 17:05:17,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:17,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553093981] [2021-06-05 17:05:17,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:17,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:17,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553093981] [2021-06-05 17:05:17,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553093981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:17,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699493827] [2021-06-05 17:05:17,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:17,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:05:17,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:17,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:05:17,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:18,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:18,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:18,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 17:05:18,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:18,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:18,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:18,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 17:05:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:18,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699493827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:18,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:18,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 17:05:18,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995852489] [2021-06-05 17:05:18,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:05:18,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:18,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:05:18,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:05:18,102 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:19,220 INFO L93 Difference]: Finished difference Result 1853 states and 6048 transitions. [2021-06-05 17:05:19,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:05:19,220 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:19,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:19,222 INFO L225 Difference]: With dead ends: 1853 [2021-06-05 17:05:19,222 INFO L226 Difference]: Without dead ends: 1838 [2021-06-05 17:05:19,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 974.1ms TimeCoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 17:05:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2021-06-05 17:05:19,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1293. [2021-06-05 17:05:19,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 3.3823529411764706) internal successors, (4370), 1292 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 4370 transitions. [2021-06-05 17:05:19,241 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 4370 transitions. Word has length 26 [2021-06-05 17:05:19,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:19,241 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 4370 transitions. [2021-06-05 17:05:19,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:19,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 4370 transitions. [2021-06-05 17:05:19,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:19,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:19,244 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:19,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 17:05:19,460 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:19,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 22 times [2021-06-05 17:05:19,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:19,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627828548] [2021-06-05 17:05:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:19,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:19,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627828548] [2021-06-05 17:05:19,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627828548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:19,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161768709] [2021-06-05 17:05:19,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:19,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:19,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:19,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 17:05:19,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:19,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:19,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:19,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 17:05:19,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:19,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:19,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:19,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 17:05:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:19,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161768709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:19,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:19,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:05:19,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969282395] [2021-06-05 17:05:19,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:05:19,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:19,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:05:19,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:19,989 INFO L87 Difference]: Start difference. First operand 1293 states and 4370 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:20,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:20,546 INFO L93 Difference]: Finished difference Result 1726 states and 5675 transitions. [2021-06-05 17:05:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:05:20,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:20,548 INFO L225 Difference]: With dead ends: 1726 [2021-06-05 17:05:20,548 INFO L226 Difference]: Without dead ends: 1705 [2021-06-05 17:05:20,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 532.0ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:05:20,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-06-05 17:05:20,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1334. [2021-06-05 17:05:20,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.377344336084021) internal successors, (4502), 1333 states have internal predecessors, (4502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:20,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4502 transitions. [2021-06-05 17:05:20,564 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4502 transitions. Word has length 26 [2021-06-05 17:05:20,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:20,564 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 4502 transitions. [2021-06-05 17:05:20,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:20,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4502 transitions. [2021-06-05 17:05:20,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:20,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:20,566 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:20,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:20,782 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:20,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:20,790 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 23 times [2021-06-05 17:05:20,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:20,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362543073] [2021-06-05 17:05:20,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:21,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:21,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362543073] [2021-06-05 17:05:21,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362543073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:21,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006049315] [2021-06-05 17:05:21,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 17:05:21,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:05:21,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:21,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 17:05:21,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:21,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:21,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:21,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2021-06-05 17:05:21,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:21,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:21,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:21,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-06-05 17:05:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:21,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006049315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:21,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:21,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 17:05:21,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235524638] [2021-06-05 17:05:21,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:05:21,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:21,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:05:21,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:05:21,368 INFO L87 Difference]: Start difference. First operand 1334 states and 4502 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:21,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:21,804 INFO L93 Difference]: Finished difference Result 1470 states and 4841 transitions. [2021-06-05 17:05:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:05:21,804 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:21,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:21,806 INFO L225 Difference]: With dead ends: 1470 [2021-06-05 17:05:21,806 INFO L226 Difference]: Without dead ends: 1451 [2021-06-05 17:05:21,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 507.9ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:05:21,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-06-05 17:05:21,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1328. [2021-06-05 17:05:21,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 3.376789751318764) internal successors, (4481), 1327 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:21,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 4481 transitions. [2021-06-05 17:05:21,823 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 4481 transitions. Word has length 26 [2021-06-05 17:05:21,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:21,823 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 4481 transitions. [2021-06-05 17:05:21,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:21,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 4481 transitions. [2021-06-05 17:05:21,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:21,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:21,828 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:22,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 17:05:22,037 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:22,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:22,037 INFO L82 PathProgramCache]: Analyzing trace with hash -31506310, now seen corresponding path program 24 times [2021-06-05 17:05:22,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:22,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199409826] [2021-06-05 17:05:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:22,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:22,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199409826] [2021-06-05 17:05:22,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199409826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:22,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669302114] [2021-06-05 17:05:22,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:22,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:05:22,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:22,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 17:05:22,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:22,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:22,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:22,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:22,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-06-05 17:05:22,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:05:22,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:22,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:22,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:28 [2021-06-05 17:05:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:22,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669302114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:22,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:22,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:05:22,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805642119] [2021-06-05 17:05:22,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:05:22,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:22,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:05:22,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:22,498 INFO L87 Difference]: Start difference. First operand 1328 states and 4481 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:23,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:23,278 INFO L93 Difference]: Finished difference Result 1962 states and 6398 transitions. [2021-06-05 17:05:23,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:05:23,278 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:23,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:23,280 INFO L225 Difference]: With dead ends: 1962 [2021-06-05 17:05:23,280 INFO L226 Difference]: Without dead ends: 1937 [2021-06-05 17:05:23,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 732.8ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-05 17:05:23,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-06-05 17:05:23,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1331. [2021-06-05 17:05:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 3.3774436090225564) internal successors, (4492), 1330 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:23,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4492 transitions. [2021-06-05 17:05:23,317 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4492 transitions. Word has length 26 [2021-06-05 17:05:23,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:23,317 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 4492 transitions. [2021-06-05 17:05:23,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:23,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4492 transitions. [2021-06-05 17:05:23,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:23,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:23,319 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:23,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 17:05:23,526 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:23,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:23,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 25 times [2021-06-05 17:05:23,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:23,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640845287] [2021-06-05 17:05:23,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:23,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:23,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640845287] [2021-06-05 17:05:23,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640845287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:23,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675791353] [2021-06-05 17:05:23,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:23,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:05:23,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:24,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:24,111 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 17:05:24,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 36 [2021-06-05 17:05:24,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:24,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:24,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:24,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:5 [2021-06-05 17:05:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:24,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675791353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:24,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:24,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 17:05:24,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675911375] [2021-06-05 17:05:24,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:05:24,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:24,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:05:24,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:05:24,142 INFO L87 Difference]: Start difference. First operand 1331 states and 4492 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:24,400 INFO L93 Difference]: Finished difference Result 1522 states and 5028 transitions. [2021-06-05 17:05:24,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:05:24,400 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:24,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:24,402 INFO L225 Difference]: With dead ends: 1522 [2021-06-05 17:05:24,402 INFO L226 Difference]: Without dead ends: 1507 [2021-06-05 17:05:24,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 446.7ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:24,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2021-06-05 17:05:24,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1337. [2021-06-05 17:05:24,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 3.379491017964072) internal successors, (4515), 1336 states have internal predecessors, (4515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:24,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 4515 transitions. [2021-06-05 17:05:24,418 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 4515 transitions. Word has length 26 [2021-06-05 17:05:24,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:24,418 INFO L482 AbstractCegarLoop]: Abstraction has 1337 states and 4515 transitions. [2021-06-05 17:05:24,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:24,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 4515 transitions. [2021-06-05 17:05:24,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:24,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:24,419 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:24,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 17:05:24,625 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:24,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:24,625 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 26 times [2021-06-05 17:05:24,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:24,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495420554] [2021-06-05 17:05:24,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:24,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:24,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495420554] [2021-06-05 17:05:24,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495420554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:24,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617837611] [2021-06-05 17:05:24,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:24,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:24,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:24,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:05:24,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:25,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:25,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:25,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-05 17:05:25,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:05:25,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:25,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:25,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-06-05 17:05:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:25,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617837611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:25,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:25,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:05:25,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555084410] [2021-06-05 17:05:25,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:05:25,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:25,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:05:25,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:05:25,088 INFO L87 Difference]: Start difference. First operand 1337 states and 4515 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:25,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:25,628 INFO L93 Difference]: Finished difference Result 1802 states and 5923 transitions. [2021-06-05 17:05:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:05:25,628 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:25,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:25,630 INFO L225 Difference]: With dead ends: 1802 [2021-06-05 17:05:25,630 INFO L226 Difference]: Without dead ends: 1777 [2021-06-05 17:05:25,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 591.2ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:05:25,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-06-05 17:05:25,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1344. [2021-06-05 17:05:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 3.3842144452717795) internal successors, (4545), 1343 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4545 transitions. [2021-06-05 17:05:25,647 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4545 transitions. Word has length 26 [2021-06-05 17:05:25,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:25,647 INFO L482 AbstractCegarLoop]: Abstraction has 1344 states and 4545 transitions. [2021-06-05 17:05:25,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:25,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4545 transitions. [2021-06-05 17:05:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:25,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:25,649 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:25,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:25,861 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:25,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:25,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 27 times [2021-06-05 17:05:25,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:25,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843171517] [2021-06-05 17:05:25,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:26,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:26,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843171517] [2021-06-05 17:05:26,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843171517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:26,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73259881] [2021-06-05 17:05:26,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:26,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:05:26,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:26,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 17:05:26,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:26,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:26,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:26,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 17:05:26,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:26,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:26,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:26,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 17:05:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:26,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73259881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:26,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:26,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:05:26,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457464904] [2021-06-05 17:05:26,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:05:26,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:26,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:05:26,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:26,267 INFO L87 Difference]: Start difference. First operand 1344 states and 4545 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:26,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:26,725 INFO L93 Difference]: Finished difference Result 1709 states and 5671 transitions. [2021-06-05 17:05:26,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:05:26,725 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:26,727 INFO L225 Difference]: With dead ends: 1709 [2021-06-05 17:05:26,727 INFO L226 Difference]: Without dead ends: 1694 [2021-06-05 17:05:26,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 500.9ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:05:26,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-06-05 17:05:26,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1355. [2021-06-05 17:05:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 3.3840472673559825) internal successors, (4582), 1354 states have internal predecessors, (4582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:26,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 4582 transitions. [2021-06-05 17:05:26,742 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 4582 transitions. Word has length 26 [2021-06-05 17:05:26,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:26,742 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 4582 transitions. [2021-06-05 17:05:26,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:26,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 4582 transitions. [2021-06-05 17:05:26,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:26,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:26,744 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:26,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 17:05:26,944 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:26,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:26,945 INFO L82 PathProgramCache]: Analyzing trace with hash 183215474, now seen corresponding path program 28 times [2021-06-05 17:05:26,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:26,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519949515] [2021-06-05 17:05:26,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:27,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:27,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519949515] [2021-06-05 17:05:27,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519949515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:27,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441039315] [2021-06-05 17:05:27,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:27,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:27,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:27,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 17:05:27,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:27,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:27,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:27,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-05 17:05:27,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:05:27,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:27,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:27,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-06-05 17:05:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:27,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441039315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:27,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:27,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:05:27,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687226236] [2021-06-05 17:05:27,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:05:27,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:27,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:05:27,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:27,334 INFO L87 Difference]: Start difference. First operand 1355 states and 4582 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:28,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:28,023 INFO L93 Difference]: Finished difference Result 2043 states and 6705 transitions. [2021-06-05 17:05:28,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:05:28,024 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:28,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:28,026 INFO L225 Difference]: With dead ends: 2043 [2021-06-05 17:05:28,026 INFO L226 Difference]: Without dead ends: 2024 [2021-06-05 17:05:28,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 607.1ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 17:05:28,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2021-06-05 17:05:28,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1356. [2021-06-05 17:05:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.3874538745387452) internal successors, (4590), 1355 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:28,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4590 transitions. [2021-06-05 17:05:28,044 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4590 transitions. Word has length 26 [2021-06-05 17:05:28,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:28,044 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4590 transitions. [2021-06-05 17:05:28,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:28,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4590 transitions. [2021-06-05 17:05:28,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:28,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:28,045 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:28,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:28,246 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:28,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:28,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 29 times [2021-06-05 17:05:28,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:28,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516274271] [2021-06-05 17:05:28,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:28,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:28,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516274271] [2021-06-05 17:05:28,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516274271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:28,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049689044] [2021-06-05 17:05:28,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:28,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:05:28,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:28,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:05:28,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:28,722 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 17:05:28,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-05 17:05:28,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:28,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:28,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:28,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:21 [2021-06-05 17:05:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:28,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049689044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:28,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:28,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:05:28,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137855950] [2021-06-05 17:05:28,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:05:28,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:28,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:05:28,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:05:28,782 INFO L87 Difference]: Start difference. First operand 1356 states and 4590 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:29,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:29,486 INFO L93 Difference]: Finished difference Result 2000 states and 6546 transitions. [2021-06-05 17:05:29,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:05:29,486 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:29,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:29,489 INFO L225 Difference]: With dead ends: 2000 [2021-06-05 17:05:29,489 INFO L226 Difference]: Without dead ends: 1950 [2021-06-05 17:05:29,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 723.5ms TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:05:29,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2021-06-05 17:05:29,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1356. [2021-06-05 17:05:29,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.3874538745387452) internal successors, (4590), 1355 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:29,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4590 transitions. [2021-06-05 17:05:29,507 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4590 transitions. Word has length 26 [2021-06-05 17:05:29,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:29,507 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4590 transitions. [2021-06-05 17:05:29,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:29,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4590 transitions. [2021-06-05 17:05:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:29,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:29,509 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:29,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 17:05:29,709 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:29,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:29,709 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-06-05 17:05:29,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:29,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5917142] [2021-06-05 17:05:29,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:29,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:29,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5917142] [2021-06-05 17:05:29,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5917142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:29,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278548200] [2021-06-05 17:05:29,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:29,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:05:29,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:29,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 17:05:29,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:30,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:30,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:30,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:30,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 17:05:30,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:30,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:30,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:30,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 17:05:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:30,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278548200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:30,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:30,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:05:30,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449923199] [2021-06-05 17:05:30,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:05:30,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:30,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:05:30,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:05:30,164 INFO L87 Difference]: Start difference. First operand 1356 states and 4590 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:30,930 INFO L93 Difference]: Finished difference Result 1907 states and 6150 transitions. [2021-06-05 17:05:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:05:30,930 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:30,933 INFO L225 Difference]: With dead ends: 1907 [2021-06-05 17:05:30,933 INFO L226 Difference]: Without dead ends: 1855 [2021-06-05 17:05:30,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 832.9ms TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:05:30,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2021-06-05 17:05:30,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1390. [2021-06-05 17:05:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.375809935205184) internal successors, (4689), 1389 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:30,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4689 transitions. [2021-06-05 17:05:30,949 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4689 transitions. Word has length 26 [2021-06-05 17:05:30,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:30,949 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4689 transitions. [2021-06-05 17:05:30,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:30,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4689 transitions. [2021-06-05 17:05:30,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:30,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:30,951 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:31,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 17:05:31,166 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:31,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:31,167 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-06-05 17:05:31,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:31,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128747697] [2021-06-05 17:05:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:31,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:31,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128747697] [2021-06-05 17:05:31,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128747697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:31,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290932269] [2021-06-05 17:05:31,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:31,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:05:31,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:31,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:31,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:31,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:31,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:31,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 17:05:31,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:31,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:31,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:31,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 17:05:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:31,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290932269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:31,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:31,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 17:05:31,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181356256] [2021-06-05 17:05:31,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:05:31,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:31,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:05:31,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:31,544 INFO L87 Difference]: Start difference. First operand 1390 states and 4689 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:32,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:32,517 INFO L93 Difference]: Finished difference Result 1968 states and 6459 transitions. [2021-06-05 17:05:32,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:05:32,517 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:32,520 INFO L225 Difference]: With dead ends: 1968 [2021-06-05 17:05:32,520 INFO L226 Difference]: Without dead ends: 1953 [2021-06-05 17:05:32,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 907.5ms TimeCoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 17:05:32,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-06-05 17:05:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1398. [2021-06-05 17:05:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.3707945597709377) internal successors, (4709), 1397 states have internal predecessors, (4709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:32,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4709 transitions. [2021-06-05 17:05:32,536 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4709 transitions. Word has length 26 [2021-06-05 17:05:32,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:32,537 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 4709 transitions. [2021-06-05 17:05:32,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:32,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4709 transitions. [2021-06-05 17:05:32,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:32,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:32,538 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:32,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 17:05:32,739 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:32,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:32,739 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 30 times [2021-06-05 17:05:32,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:32,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484972612] [2021-06-05 17:05:32,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:32,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:32,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484972612] [2021-06-05 17:05:32,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484972612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:32,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988913096] [2021-06-05 17:05:32,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:32,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:05:32,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:32,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:05:32,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:33,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:33,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 17:05:33,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:33,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:33,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:33,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:98 [2021-06-05 17:05:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:33,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988913096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:33,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:33,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:05:33,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138716039] [2021-06-05 17:05:33,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:05:33,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:33,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:05:33,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:05:33,303 INFO L87 Difference]: Start difference. First operand 1398 states and 4709 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:35,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:35,658 INFO L93 Difference]: Finished difference Result 2366 states and 7465 transitions. [2021-06-05 17:05:35,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 17:05:35,658 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:35,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:35,661 INFO L225 Difference]: With dead ends: 2366 [2021-06-05 17:05:35,661 INFO L226 Difference]: Without dead ends: 2332 [2021-06-05 17:05:35,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 2116.8ms TimeCoverageRelationStatistics Valid=441, Invalid=2109, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:05:35,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-06-05 17:05:35,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1421. [2021-06-05 17:05:35,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 3.3816901408450706) internal successors, (4802), 1420 states have internal predecessors, (4802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 4802 transitions. [2021-06-05 17:05:35,682 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 4802 transitions. Word has length 26 [2021-06-05 17:05:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:35,682 INFO L482 AbstractCegarLoop]: Abstraction has 1421 states and 4802 transitions. [2021-06-05 17:05:35,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:35,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 4802 transitions. [2021-06-05 17:05:35,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:35,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:35,684 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:35,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:35,885 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:35,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:35,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-06-05 17:05:35,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:35,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023218068] [2021-06-05 17:05:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:36,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:36,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023218068] [2021-06-05 17:05:36,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023218068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:36,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470633941] [2021-06-05 17:05:36,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:36,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:36,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:36,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 17:05:36,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:36,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:36,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:36,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:36,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:36,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 17:05:36,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:05:36,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:36,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:36,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:46 [2021-06-05 17:05:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:36,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470633941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:36,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:36,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 17:05:36,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038445839] [2021-06-05 17:05:36,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:05:36,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:36,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:05:36,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:05:36,457 INFO L87 Difference]: Start difference. First operand 1421 states and 4802 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:38,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:38,984 INFO L93 Difference]: Finished difference Result 2286 states and 7249 transitions. [2021-06-05 17:05:38,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:05:38,985 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:38,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:38,988 INFO L225 Difference]: With dead ends: 2286 [2021-06-05 17:05:38,988 INFO L226 Difference]: Without dead ends: 2249 [2021-06-05 17:05:38,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 2283.9ms TimeCoverageRelationStatistics Valid=447, Invalid=2415, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:05:38,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2021-06-05 17:05:39,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 1440. [2021-06-05 17:05:39,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 3.3794301598332175) internal successors, (4863), 1439 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 4863 transitions. [2021-06-05 17:05:39,014 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 4863 transitions. Word has length 26 [2021-06-05 17:05:39,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:39,014 INFO L482 AbstractCegarLoop]: Abstraction has 1440 states and 4863 transitions. [2021-06-05 17:05:39,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:39,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 4863 transitions. [2021-06-05 17:05:39,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:39,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:39,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:39,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 17:05:39,217 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:39,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:39,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1791604362, now seen corresponding path program 31 times [2021-06-05 17:05:39,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:39,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968443286] [2021-06-05 17:05:39,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:39,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:39,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968443286] [2021-06-05 17:05:39,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968443286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:39,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787039776] [2021-06-05 17:05:39,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:39,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 17:05:39,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:39,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:39,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:39,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 17:05:39,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:39,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:39,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:39,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 17:05:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:39,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787039776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:39,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:39,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:05:39,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903157998] [2021-06-05 17:05:39,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:05:39,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:39,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:05:39,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:39,585 INFO L87 Difference]: Start difference. First operand 1440 states and 4863 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:40,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:40,359 INFO L93 Difference]: Finished difference Result 2060 states and 6655 transitions. [2021-06-05 17:05:40,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:05:40,360 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:40,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:40,362 INFO L225 Difference]: With dead ends: 2060 [2021-06-05 17:05:40,362 INFO L226 Difference]: Without dead ends: 2045 [2021-06-05 17:05:40,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 740.6ms TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2021-06-05 17:05:40,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-06-05 17:05:40,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1446. [2021-06-05 17:05:40,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.382006920415225) internal successors, (4887), 1445 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:40,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4887 transitions. [2021-06-05 17:05:40,380 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4887 transitions. Word has length 26 [2021-06-05 17:05:40,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:40,380 INFO L482 AbstractCegarLoop]: Abstraction has 1446 states and 4887 transitions. [2021-06-05 17:05:40,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:40,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4887 transitions. [2021-06-05 17:05:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:40,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:40,382 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:40,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:40,583 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:40,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:40,583 INFO L82 PathProgramCache]: Analyzing trace with hash 885830154, now seen corresponding path program 32 times [2021-06-05 17:05:40,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:40,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324675834] [2021-06-05 17:05:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:40,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:40,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324675834] [2021-06-05 17:05:40,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324675834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:40,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988427618] [2021-06-05 17:05:40,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:40,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:40,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:40,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:05:40,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:40,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:40,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 17:05:40,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:40,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:40,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 17:05:40,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:312 [2021-06-05 17:05:41,121 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 17:05:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:41,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988427618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:41,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:41,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 17:05:41,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845110920] [2021-06-05 17:05:41,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:05:41,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:41,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:05:41,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:05:41,297 INFO L87 Difference]: Start difference. First operand 1446 states and 4887 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:42,310 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 17:05:42,469 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 38 [2021-06-05 17:05:42,608 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-06-05 17:05:42,921 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-05 17:05:43,094 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2021-06-05 17:05:43,734 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-06-05 17:05:43,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:43,996 INFO L93 Difference]: Finished difference Result 2667 states and 8418 transitions. [2021-06-05 17:05:43,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 17:05:43,996 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:43,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:43,999 INFO L225 Difference]: With dead ends: 2667 [2021-06-05 17:05:43,999 INFO L226 Difference]: Without dead ends: 2629 [2021-06-05 17:05:44,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 2569.9ms TimeCoverageRelationStatistics Valid=444, Invalid=1908, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:05:44,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2021-06-05 17:05:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 1442. [2021-06-05 17:05:44,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3809854267869537) internal successors, (4872), 1441 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4872 transitions. [2021-06-05 17:05:44,021 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4872 transitions. Word has length 26 [2021-06-05 17:05:44,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:44,021 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4872 transitions. [2021-06-05 17:05:44,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:44,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4872 transitions. [2021-06-05 17:05:44,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:44,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:44,022 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:44,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 17:05:44,223 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:44,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:44,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 45 times [2021-06-05 17:05:44,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:44,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475859856] [2021-06-05 17:05:44,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:44,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:44,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475859856] [2021-06-05 17:05:44,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475859856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:44,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082406418] [2021-06-05 17:05:44,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 17:05:44,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:05:44,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:44,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 17:05:44,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:44,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:44,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:44,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:44,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:44,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 17:05:44,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:05:44,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:44,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:44,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:46 [2021-06-05 17:05:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:44,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082406418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:44,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:44,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 17:05:44,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559651690] [2021-06-05 17:05:44,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:05:44,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:44,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:05:44,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:05:44,694 INFO L87 Difference]: Start difference. First operand 1442 states and 4872 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:46,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:46,115 INFO L93 Difference]: Finished difference Result 2363 states and 7703 transitions. [2021-06-05 17:05:46,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:05:46,115 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:46,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:46,118 INFO L225 Difference]: With dead ends: 2363 [2021-06-05 17:05:46,118 INFO L226 Difference]: Without dead ends: 2348 [2021-06-05 17:05:46,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1235.8ms TimeCoverageRelationStatistics Valid=351, Invalid=1719, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:05:46,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-05 17:05:46,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1449. [2021-06-05 17:05:46,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 3.382596685082873) internal successors, (4898), 1448 states have internal predecessors, (4898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:46,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 4898 transitions. [2021-06-05 17:05:46,143 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 4898 transitions. Word has length 26 [2021-06-05 17:05:46,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:46,143 INFO L482 AbstractCegarLoop]: Abstraction has 1449 states and 4898 transitions. [2021-06-05 17:05:46,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:46,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 4898 transitions. [2021-06-05 17:05:46,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:46,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:46,145 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:46,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:46,355 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:46,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:46,355 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 46 times [2021-06-05 17:05:46,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:46,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996129662] [2021-06-05 17:05:46,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:46,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:46,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996129662] [2021-06-05 17:05:46,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996129662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:46,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818547588] [2021-06-05 17:05:46,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:46,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:46,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:46,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:05:46,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:46,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:46,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:46,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:46,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-05 17:05:46,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:05:46,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:46,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:46,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-06-05 17:05:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:46,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818547588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:46,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:46,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 17:05:46,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917442999] [2021-06-05 17:05:46,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:05:46,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:46,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:05:46,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:05:46,776 INFO L87 Difference]: Start difference. First operand 1449 states and 4898 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:48,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:48,639 INFO L93 Difference]: Finished difference Result 3450 states and 10856 transitions. [2021-06-05 17:05:48,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 17:05:48,640 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:48,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:48,645 INFO L225 Difference]: With dead ends: 3450 [2021-06-05 17:05:48,645 INFO L226 Difference]: Without dead ends: 3393 [2021-06-05 17:05:48,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1635.6ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:05:48,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3393 states. [2021-06-05 17:05:48,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3393 to 1615. [2021-06-05 17:05:48,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 3.4052044609665426) internal successors, (5496), 1614 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 5496 transitions. [2021-06-05 17:05:48,680 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 5496 transitions. Word has length 26 [2021-06-05 17:05:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:48,680 INFO L482 AbstractCegarLoop]: Abstraction has 1615 states and 5496 transitions. [2021-06-05 17:05:48,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:48,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 5496 transitions. [2021-06-05 17:05:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:48,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:48,682 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:48,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 17:05:48,889 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:48,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:48,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2079051698, now seen corresponding path program 33 times [2021-06-05 17:05:48,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:48,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324510472] [2021-06-05 17:05:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:49,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:49,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324510472] [2021-06-05 17:05:49,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324510472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:49,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810054090] [2021-06-05 17:05:49,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:49,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:05:49,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:49,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:05:49,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:49,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:49,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 17:05:49,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:49,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:49,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:49,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:75 [2021-06-05 17:05:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:49,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810054090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:49,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:49,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 17:05:49,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180550224] [2021-06-05 17:05:49,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:05:49,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:49,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:05:49,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:05:49,339 INFO L87 Difference]: Start difference. First operand 1615 states and 5496 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:50,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:50,776 INFO L93 Difference]: Finished difference Result 2210 states and 7258 transitions. [2021-06-05 17:05:50,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:05:50,777 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:50,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:50,779 INFO L225 Difference]: With dead ends: 2210 [2021-06-05 17:05:50,779 INFO L226 Difference]: Without dead ends: 2180 [2021-06-05 17:05:50,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1139.4ms TimeCoverageRelationStatistics Valid=284, Invalid=1522, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:05:50,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2021-06-05 17:05:50,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1620. [2021-06-05 17:05:50,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.4021000617665225) internal successors, (5508), 1619 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:50,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5508 transitions. [2021-06-05 17:05:50,799 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5508 transitions. Word has length 26 [2021-06-05 17:05:50,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:50,800 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5508 transitions. [2021-06-05 17:05:50,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:50,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5508 transitions. [2021-06-05 17:05:50,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:50,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:50,801 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:51,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:51,002 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:51,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:51,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 34 times [2021-06-05 17:05:51,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:51,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521609673] [2021-06-05 17:05:51,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:51,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:51,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521609673] [2021-06-05 17:05:51,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521609673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:51,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779106210] [2021-06-05 17:05:51,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:51,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:51,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:51,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 17:05:51,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:51,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:51,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:51,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-05 17:05:51,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:05:51,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:51,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:51,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-06-05 17:05:51,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:51,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779106210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:51,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:51,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:05:51,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494756352] [2021-06-05 17:05:51,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:05:51,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:51,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:05:51,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:51,332 INFO L87 Difference]: Start difference. First operand 1620 states and 5508 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:51,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:51,989 INFO L93 Difference]: Finished difference Result 2187 states and 7261 transitions. [2021-06-05 17:05:51,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:05:51,989 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:51,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:51,992 INFO L225 Difference]: With dead ends: 2187 [2021-06-05 17:05:51,992 INFO L226 Difference]: Without dead ends: 2162 [2021-06-05 17:05:51,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 556.4ms TimeCoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:05:51,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-06-05 17:05:52,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 1623. [2021-06-05 17:05:52,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 3.401356350184957) internal successors, (5517), 1622 states have internal predecessors, (5517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 5517 transitions. [2021-06-05 17:05:52,011 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 5517 transitions. Word has length 26 [2021-06-05 17:05:52,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:52,011 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 5517 transitions. [2021-06-05 17:05:52,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:52,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 5517 transitions. [2021-06-05 17:05:52,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:52,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:52,013 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:52,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:52,215 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:52,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:52,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2031976096, now seen corresponding path program 35 times [2021-06-05 17:05:52,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:52,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270738625] [2021-06-05 17:05:52,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:52,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:52,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270738625] [2021-06-05 17:05:52,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270738625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:52,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026244441] [2021-06-05 17:05:52,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:52,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:05:52,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:52,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 17:05:52,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:52,768 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 17:05:52,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 56 [2021-06-05 17:05:52,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:52,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:52,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:52,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:19 [2021-06-05 17:05:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:52,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026244441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:52,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:52,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:05:52,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104114658] [2021-06-05 17:05:52,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:05:52,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:52,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:05:52,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:05:52,826 INFO L87 Difference]: Start difference. First operand 1623 states and 5517 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:54,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:54,057 INFO L93 Difference]: Finished difference Result 2464 states and 8030 transitions. [2021-06-05 17:05:54,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:05:54,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:54,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:54,061 INFO L225 Difference]: With dead ends: 2464 [2021-06-05 17:05:54,061 INFO L226 Difference]: Without dead ends: 2430 [2021-06-05 17:05:54,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1120.8ms TimeCoverageRelationStatistics Valid=357, Invalid=1535, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:05:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2021-06-05 17:05:54,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 1617. [2021-06-05 17:05:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 3.3991336633663365) internal successors, (5493), 1616 states have internal predecessors, (5493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:54,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 5493 transitions. [2021-06-05 17:05:54,083 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 5493 transitions. Word has length 26 [2021-06-05 17:05:54,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:54,083 INFO L482 AbstractCegarLoop]: Abstraction has 1617 states and 5493 transitions. [2021-06-05 17:05:54,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:54,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 5493 transitions. [2021-06-05 17:05:54,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:54,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:54,085 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:54,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:54,289 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:54,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:54,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 47 times [2021-06-05 17:05:54,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:54,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841863049] [2021-06-05 17:05:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:54,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:54,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:54,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841863049] [2021-06-05 17:05:54,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841863049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:54,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400059113] [2021-06-05 17:05:54,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:54,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:05:54,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:54,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:05:54,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:54,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:54,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:54,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:54,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:54,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 17:05:54,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:54,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:54,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:54,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 17:05:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:54,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400059113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:54,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:54,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 17:05:54,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259555578] [2021-06-05 17:05:54,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:05:54,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:54,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:05:54,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:54,742 INFO L87 Difference]: Start difference. First operand 1617 states and 5493 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:55,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:55,913 INFO L93 Difference]: Finished difference Result 2080 states and 6843 transitions. [2021-06-05 17:05:55,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:05:55,913 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:55,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:55,916 INFO L225 Difference]: With dead ends: 2080 [2021-06-05 17:05:55,916 INFO L226 Difference]: Without dead ends: 2058 [2021-06-05 17:05:55,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1063.8ms TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:05:55,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-06-05 17:05:55,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1607. [2021-06-05 17:05:55,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 3.398505603985056) internal successors, (5458), 1606 states have internal predecessors, (5458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5458 transitions. [2021-06-05 17:05:55,936 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5458 transitions. Word has length 26 [2021-06-05 17:05:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:55,936 INFO L482 AbstractCegarLoop]: Abstraction has 1607 states and 5458 transitions. [2021-06-05 17:05:55,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5458 transitions. [2021-06-05 17:05:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:55,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:55,938 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:56,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:56,139 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:56,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:56,139 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 48 times [2021-06-05 17:05:56,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:56,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139941458] [2021-06-05 17:05:56,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:56,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:56,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:56,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139941458] [2021-06-05 17:05:56,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139941458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:56,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387178107] [2021-06-05 17:05:56,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:56,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:05:56,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:56,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:05:56,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:56,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:56,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:56,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:56,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:56,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:05:56,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:56,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:56,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:56,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 17:05:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:56,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387178107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:56,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:56,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 17:05:56,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427707710] [2021-06-05 17:05:56,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:05:56,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:56,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:05:56,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:05:56,590 INFO L87 Difference]: Start difference. First operand 1607 states and 5458 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:58,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:58,060 INFO L93 Difference]: Finished difference Result 2207 states and 7294 transitions. [2021-06-05 17:05:58,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:05:58,060 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:05:58,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:58,064 INFO L225 Difference]: With dead ends: 2207 [2021-06-05 17:05:58,064 INFO L226 Difference]: Without dead ends: 2192 [2021-06-05 17:05:58,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1392.5ms TimeCoverageRelationStatistics Valid=358, Invalid=1534, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:05:58,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-06-05 17:05:58,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1607. [2021-06-05 17:05:58,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 3.398505603985056) internal successors, (5458), 1606 states have internal predecessors, (5458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5458 transitions. [2021-06-05 17:05:58,085 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5458 transitions. Word has length 26 [2021-06-05 17:05:58,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:58,085 INFO L482 AbstractCegarLoop]: Abstraction has 1607 states and 5458 transitions. [2021-06-05 17:05:58,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:58,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5458 transitions. [2021-06-05 17:05:58,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:58,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:58,087 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:58,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 17:05:58,287 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:58,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:58,287 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 49 times [2021-06-05 17:05:58,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:58,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755683211] [2021-06-05 17:05:58,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:58,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:58,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755683211] [2021-06-05 17:05:58,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755683211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:58,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090461303] [2021-06-05 17:05:58,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:58,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:05:58,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:58,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:58,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:58,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:58,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 17:05:58,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:58,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:58,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:58,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 17:05:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:58,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090461303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:58,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:58,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 17:05:58,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670917641] [2021-06-05 17:05:58,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:05:58,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:58,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:05:58,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:05:58,674 INFO L87 Difference]: Start difference. First operand 1607 states and 5458 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:00,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:00,119 INFO L93 Difference]: Finished difference Result 2722 states and 8796 transitions. [2021-06-05 17:06:00,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 17:06:00,120 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:00,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:00,123 INFO L225 Difference]: With dead ends: 2722 [2021-06-05 17:06:00,124 INFO L226 Difference]: Without dead ends: 2686 [2021-06-05 17:06:00,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1309.4ms TimeCoverageRelationStatistics Valid=386, Invalid=1870, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:06:00,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-06-05 17:06:00,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 1677. [2021-06-05 17:06:00,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 3.389021479713604) internal successors, (5680), 1676 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:00,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 5680 transitions. [2021-06-05 17:06:00,157 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 5680 transitions. Word has length 26 [2021-06-05 17:06:00,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:00,157 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 5680 transitions. [2021-06-05 17:06:00,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:00,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 5680 transitions. [2021-06-05 17:06:00,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:00,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:00,159 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:00,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 17:06:00,359 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:00,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:00,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1611336786, now seen corresponding path program 50 times [2021-06-05 17:06:00,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:00,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111714576] [2021-06-05 17:06:00,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:00,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:00,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111714576] [2021-06-05 17:06:00,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111714576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:00,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104599182] [2021-06-05 17:06:00,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:00,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:06:00,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:00,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:06:00,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:00,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:00,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:00,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:00,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:00,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-05 17:06:00,763 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:06:00,776 INFO L628 ElimStorePlain]: treesize reduction 20, result has 47.4 percent of original size [2021-06-05 17:06:00,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:00,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:18 [2021-06-05 17:06:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:00,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104599182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:00,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:00,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-06-05 17:06:00,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522362987] [2021-06-05 17:06:00,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:06:00,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:00,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:06:00,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:06:00,818 INFO L87 Difference]: Start difference. First operand 1677 states and 5680 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:04,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:04,582 INFO L93 Difference]: Finished difference Result 3350 states and 10511 transitions. [2021-06-05 17:06:04,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 17:06:04,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:04,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:04,587 INFO L225 Difference]: With dead ends: 3350 [2021-06-05 17:06:04,587 INFO L226 Difference]: Without dead ends: 3286 [2021-06-05 17:06:04,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2283 ImplicationChecksByTransitivity, 3322.0ms TimeCoverageRelationStatistics Valid=1163, Invalid=5317, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 17:06:04,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-06-05 17:06:04,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 1694. [2021-06-05 17:06:04,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1693 states have (on average 3.375073833431778) internal successors, (5714), 1693 states have internal predecessors, (5714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 5714 transitions. [2021-06-05 17:06:04,615 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 5714 transitions. Word has length 26 [2021-06-05 17:06:04,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:04,615 INFO L482 AbstractCegarLoop]: Abstraction has 1694 states and 5714 transitions. [2021-06-05 17:06:04,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:04,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 5714 transitions. [2021-06-05 17:06:04,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:04,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:04,617 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:04,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 17:06:04,817 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:04,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:04,818 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 51 times [2021-06-05 17:06:04,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:04,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880908273] [2021-06-05 17:06:04,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:05,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:05,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880908273] [2021-06-05 17:06:05,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880908273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:05,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394488550] [2021-06-05 17:06:05,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:05,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:06:05,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:05,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:06:05,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:05,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:05,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 51 [2021-06-05 17:06:05,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:06:05,374 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-06-05 17:06:05,374 INFO L628 ElimStorePlain]: treesize reduction 81, result has 51.5 percent of original size [2021-06-05 17:06:05,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:05,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:273 [2021-06-05 17:06:05,517 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-05 17:06:05,692 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-06-05 17:06:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:05,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394488550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:05,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:05,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 17:06:05,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295941200] [2021-06-05 17:06:05,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:06:05,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:05,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:06:05,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:06:05,763 INFO L87 Difference]: Start difference. First operand 1694 states and 5714 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:06,647 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 17:06:07,014 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-06-05 17:06:07,260 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-05 17:06:07,621 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-06-05 17:06:08,261 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-06-05 17:06:08,599 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2021-06-05 17:06:08,762 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-05 17:06:08,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:08,844 INFO L93 Difference]: Finished difference Result 2842 states and 9155 transitions. [2021-06-05 17:06:08,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 17:06:08,844 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:08,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:08,848 INFO L225 Difference]: With dead ends: 2842 [2021-06-05 17:06:08,848 INFO L226 Difference]: Without dead ends: 2797 [2021-06-05 17:06:08,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 3020.4ms TimeCoverageRelationStatistics Valid=552, Invalid=2640, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:06:08,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2021-06-05 17:06:08,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 1705. [2021-06-05 17:06:08,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.380868544600939) internal successors, (5761), 1704 states have internal predecessors, (5761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:08,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5761 transitions. [2021-06-05 17:06:08,872 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5761 transitions. Word has length 26 [2021-06-05 17:06:08,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:08,872 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 5761 transitions. [2021-06-05 17:06:08,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:08,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5761 transitions. [2021-06-05 17:06:08,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:08,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:08,874 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:09,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:09,089 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:09,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:09,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1813857782, now seen corresponding path program 52 times [2021-06-05 17:06:09,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:09,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389609190] [2021-06-05 17:06:09,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:09,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:09,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389609190] [2021-06-05 17:06:09,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389609190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:09,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318239844] [2021-06-05 17:06:09,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:09,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:06:09,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:09,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:06:09,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:09,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:09,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:09,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:09,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:09,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:06:09,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:09,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:09,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:09,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:10 [2021-06-05 17:06:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:09,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318239844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:09,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:09,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 17:06:09,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053060514] [2021-06-05 17:06:09,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:09,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:09,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:09,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:09,513 INFO L87 Difference]: Start difference. First operand 1705 states and 5761 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:10,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:10,988 INFO L93 Difference]: Finished difference Result 2158 states and 7106 transitions. [2021-06-05 17:06:10,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:06:10,988 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:10,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:10,991 INFO L225 Difference]: With dead ends: 2158 [2021-06-05 17:06:10,991 INFO L226 Difference]: Without dead ends: 2143 [2021-06-05 17:06:10,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1358.1ms TimeCoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:06:10,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-06-05 17:06:11,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1709. [2021-06-05 17:06:11,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1708 states have (on average 3.3811475409836067) internal successors, (5775), 1708 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:11,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 5775 transitions. [2021-06-05 17:06:11,013 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 5775 transitions. Word has length 26 [2021-06-05 17:06:11,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:11,013 INFO L482 AbstractCegarLoop]: Abstraction has 1709 states and 5775 transitions. [2021-06-05 17:06:11,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:11,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 5775 transitions. [2021-06-05 17:06:11,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:11,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:11,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:11,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 17:06:11,216 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:11,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:11,216 INFO L82 PathProgramCache]: Analyzing trace with hash -782211534, now seen corresponding path program 53 times [2021-06-05 17:06:11,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:11,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452464397] [2021-06-05 17:06:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:11,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:11,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452464397] [2021-06-05 17:06:11,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452464397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:11,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610188938] [2021-06-05 17:06:11,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:11,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 17:06:11,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:11,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 17:06:11,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:11,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:11,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:11,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:11,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-05 17:06:11,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:06:11,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:11,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:11,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 17:06:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:11,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610188938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:11,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:11,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 17:06:11,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282221499] [2021-06-05 17:06:11,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:06:11,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:11,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:06:11,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:06:11,722 INFO L87 Difference]: Start difference. First operand 1709 states and 5775 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:12,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:12,880 INFO L93 Difference]: Finished difference Result 2441 states and 8075 transitions. [2021-06-05 17:06:12,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 17:06:12,881 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:12,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:12,884 INFO L225 Difference]: With dead ends: 2441 [2021-06-05 17:06:12,884 INFO L226 Difference]: Without dead ends: 2426 [2021-06-05 17:06:12,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 990.0ms TimeCoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:06:12,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-05 17:06:12,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1709. [2021-06-05 17:06:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1708 states have (on average 3.3811475409836067) internal successors, (5775), 1708 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:12,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 5775 transitions. [2021-06-05 17:06:12,914 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 5775 transitions. Word has length 26 [2021-06-05 17:06:12,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:12,914 INFO L482 AbstractCegarLoop]: Abstraction has 1709 states and 5775 transitions. [2021-06-05 17:06:12,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:12,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 5775 transitions. [2021-06-05 17:06:12,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:12,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:12,916 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:13,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 17:06:13,116 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:13,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:13,117 INFO L82 PathProgramCache]: Analyzing trace with hash 370367166, now seen corresponding path program 54 times [2021-06-05 17:06:13,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:13,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710215970] [2021-06-05 17:06:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:13,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:13,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710215970] [2021-06-05 17:06:13,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710215970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:13,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62730333] [2021-06-05 17:06:13,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:13,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:06:13,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:13,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:06:13,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:13,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:13,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:13,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:13,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 17:06:13,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:13,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:13,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:13,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 17:06:13,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:13,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62730333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:13,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:13,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 17:06:13,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015172925] [2021-06-05 17:06:13,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:13,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:13,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:13,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:13,521 INFO L87 Difference]: Start difference. First operand 1709 states and 5775 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:14,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:14,256 INFO L93 Difference]: Finished difference Result 2137 states and 7029 transitions. [2021-06-05 17:06:14,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:06:14,256 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:14,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:14,259 INFO L225 Difference]: With dead ends: 2137 [2021-06-05 17:06:14,259 INFO L226 Difference]: Without dead ends: 2118 [2021-06-05 17:06:14,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 787.6ms TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 17:06:14,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2021-06-05 17:06:14,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1703. [2021-06-05 17:06:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 3.380728554641598) internal successors, (5754), 1702 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:14,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5754 transitions. [2021-06-05 17:06:14,292 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5754 transitions. Word has length 26 [2021-06-05 17:06:14,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:14,292 INFO L482 AbstractCegarLoop]: Abstraction has 1703 states and 5754 transitions. [2021-06-05 17:06:14,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:14,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5754 transitions. [2021-06-05 17:06:14,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:14,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:14,294 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:14,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:14,495 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:14,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:14,496 INFO L82 PathProgramCache]: Analyzing trace with hash 376151132, now seen corresponding path program 55 times [2021-06-05 17:06:14,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:14,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283065108] [2021-06-05 17:06:14,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:14,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:14,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283065108] [2021-06-05 17:06:14,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283065108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:14,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944139080] [2021-06-05 17:06:14,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:14,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:06:14,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:14,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:14,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:14,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:14,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 17:06:14,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:06:14,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:14,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:14,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:18 [2021-06-05 17:06:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:14,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944139080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:14,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:14,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 17:06:14,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269387992] [2021-06-05 17:06:14,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:06:14,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:14,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:06:14,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:06:14,929 INFO L87 Difference]: Start difference. First operand 1703 states and 5754 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:16,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:16,762 INFO L93 Difference]: Finished difference Result 2951 states and 9376 transitions. [2021-06-05 17:06:16,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:06:16,762 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:16,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:16,766 INFO L225 Difference]: With dead ends: 2951 [2021-06-05 17:06:16,766 INFO L226 Difference]: Without dead ends: 2932 [2021-06-05 17:06:16,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1690.3ms TimeCoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:06:16,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2021-06-05 17:06:16,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 1697. [2021-06-05 17:06:16,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 3.3767688679245285) internal successors, (5727), 1696 states have internal predecessors, (5727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:16,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 5727 transitions. [2021-06-05 17:06:16,795 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 5727 transitions. Word has length 26 [2021-06-05 17:06:16,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:16,795 INFO L482 AbstractCegarLoop]: Abstraction has 1697 states and 5727 transitions. [2021-06-05 17:06:16,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:16,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 5727 transitions. [2021-06-05 17:06:16,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:16,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:16,797 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:16,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:16,998 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:16,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:16,998 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 36 times [2021-06-05 17:06:16,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:16,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737535857] [2021-06-05 17:06:16,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:17,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:17,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737535857] [2021-06-05 17:06:17,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737535857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:17,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186118258] [2021-06-05 17:06:17,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:17,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:06:17,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:17,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 17:06:17,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:17,305 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 17:06:17,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 64 [2021-06-05 17:06:17,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:17,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:17,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:17,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:49 [2021-06-05 17:06:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:17,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186118258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:17,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:17,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:06:17,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430127024] [2021-06-05 17:06:17,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:06:17,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:17,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:06:17,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:06:17,360 INFO L87 Difference]: Start difference. First operand 1697 states and 5727 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:18,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:18,689 INFO L93 Difference]: Finished difference Result 2361 states and 7668 transitions. [2021-06-05 17:06:18,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:06:18,689 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:18,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:18,693 INFO L225 Difference]: With dead ends: 2361 [2021-06-05 17:06:18,693 INFO L226 Difference]: Without dead ends: 2331 [2021-06-05 17:06:18,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 981.2ms TimeCoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:06:18,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-05 17:06:18,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1708. [2021-06-05 17:06:18,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.3807850029291155) internal successors, (5771), 1707 states have internal predecessors, (5771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5771 transitions. [2021-06-05 17:06:18,716 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5771 transitions. Word has length 26 [2021-06-05 17:06:18,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:18,716 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 5771 transitions. [2021-06-05 17:06:18,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:18,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5771 transitions. [2021-06-05 17:06:18,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:18,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:18,719 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:18,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 17:06:18,933 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:18,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:18,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1644457752, now seen corresponding path program 37 times [2021-06-05 17:06:18,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:18,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21178212] [2021-06-05 17:06:18,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:19,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:19,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21178212] [2021-06-05 17:06:19,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21178212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:19,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034763128] [2021-06-05 17:06:19,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:19,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:06:19,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:19,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:19,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:19,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:19,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2021-06-05 17:06:19,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:06:19,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:19,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:19,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-06-05 17:06:19,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:19,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034763128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:19,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:19,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:06:19,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668041233] [2021-06-05 17:06:19,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:19,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:19,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:19,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:19,240 INFO L87 Difference]: Start difference. First operand 1708 states and 5771 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:20,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:20,055 INFO L93 Difference]: Finished difference Result 2199 states and 7281 transitions. [2021-06-05 17:06:20,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 17:06:20,055 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:20,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:20,058 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 17:06:20,058 INFO L226 Difference]: Without dead ends: 2184 [2021-06-05 17:06:20,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 675.3ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:06:20,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-06-05 17:06:20,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1697. [2021-06-05 17:06:20,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 3.3838443396226414) internal successors, (5739), 1696 states have internal predecessors, (5739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:20,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 5739 transitions. [2021-06-05 17:06:20,091 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 5739 transitions. Word has length 26 [2021-06-05 17:06:20,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:20,092 INFO L482 AbstractCegarLoop]: Abstraction has 1697 states and 5739 transitions. [2021-06-05 17:06:20,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:20,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 5739 transitions. [2021-06-05 17:06:20,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:20,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:20,094 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:20,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:20,305 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:20,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:20,305 INFO L82 PathProgramCache]: Analyzing trace with hash 224636922, now seen corresponding path program 38 times [2021-06-05 17:06:20,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:20,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241441924] [2021-06-05 17:06:20,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:20,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:20,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241441924] [2021-06-05 17:06:20,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241441924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:20,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026517603] [2021-06-05 17:06:20,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:20,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:06:20,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:20,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:06:20,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:20,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:20,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:20,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 17:06:20,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:20,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:20,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:20,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 17:06:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:20,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026517603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:20,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:20,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:06:20,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171660239] [2021-06-05 17:06:20,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:20,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:20,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:20,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:20,657 INFO L87 Difference]: Start difference. First operand 1697 states and 5739 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:21,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:21,219 INFO L93 Difference]: Finished difference Result 2365 states and 7781 transitions. [2021-06-05 17:06:21,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:06:21,220 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:21,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:21,223 INFO L225 Difference]: With dead ends: 2365 [2021-06-05 17:06:21,223 INFO L226 Difference]: Without dead ends: 2350 [2021-06-05 17:06:21,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 533.2ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-06-05 17:06:21,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2021-06-05 17:06:21,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1689. [2021-06-05 17:06:21,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1688 states have (on average 3.382701421800948) internal successors, (5710), 1688 states have internal predecessors, (5710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 5710 transitions. [2021-06-05 17:06:21,246 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 5710 transitions. Word has length 26 [2021-06-05 17:06:21,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:21,246 INFO L482 AbstractCegarLoop]: Abstraction has 1689 states and 5710 transitions. [2021-06-05 17:06:21,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 5710 transitions. [2021-06-05 17:06:21,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:21,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:21,248 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:21,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:21,449 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:21,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:21,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1034369354, now seen corresponding path program 39 times [2021-06-05 17:06:21,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:21,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452293913] [2021-06-05 17:06:21,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:21,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:21,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452293913] [2021-06-05 17:06:21,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452293913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:21,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512955421] [2021-06-05 17:06:21,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:21,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:06:21,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:21,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 17:06:21,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:21,742 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 17:06:21,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-05 17:06:21,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:21,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:21,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:21,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2021-06-05 17:06:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:21,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512955421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:21,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:21,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:06:21,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111004480] [2021-06-05 17:06:21,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:21,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:21,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:21,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:21,791 INFO L87 Difference]: Start difference. First operand 1689 states and 5710 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:22,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:22,458 INFO L93 Difference]: Finished difference Result 2545 states and 8378 transitions. [2021-06-05 17:06:22,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:06:22,459 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:22,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:22,462 INFO L225 Difference]: With dead ends: 2545 [2021-06-05 17:06:22,462 INFO L226 Difference]: Without dead ends: 2530 [2021-06-05 17:06:22,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 634.2ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-06-05 17:06:22,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-05 17:06:22,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 1683. [2021-06-05 17:06:22,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.3787158145065397) internal successors, (5683), 1682 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:22,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5683 transitions. [2021-06-05 17:06:22,483 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5683 transitions. Word has length 26 [2021-06-05 17:06:22,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:22,483 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5683 transitions. [2021-06-05 17:06:22,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:22,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5683 transitions. [2021-06-05 17:06:22,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:22,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:22,485 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:22,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:22,686 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:22,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:22,686 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 40 times [2021-06-05 17:06:22,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:22,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395163712] [2021-06-05 17:06:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:22,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:22,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395163712] [2021-06-05 17:06:22,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395163712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:22,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688763058] [2021-06-05 17:06:22,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:22,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:06:22,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:22,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:06:22,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:22,984 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 17:06:22,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 49 [2021-06-05 17:06:22,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:22,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:22,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:22,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-06-05 17:06:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:23,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688763058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:23,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:23,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:06:23,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768191057] [2021-06-05 17:06:23,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:23,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:23,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:23,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:23,002 INFO L87 Difference]: Start difference. First operand 1683 states and 5683 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:23,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:23,577 INFO L93 Difference]: Finished difference Result 2243 states and 7363 transitions. [2021-06-05 17:06:23,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:06:23,577 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:23,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:23,580 INFO L225 Difference]: With dead ends: 2243 [2021-06-05 17:06:23,580 INFO L226 Difference]: Without dead ends: 2218 [2021-06-05 17:06:23,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 534.9ms TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-06-05 17:06:23,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-06-05 17:06:23,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 1692. [2021-06-05 17:06:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 3.3820224719101124) internal successors, (5719), 1691 states have internal predecessors, (5719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 5719 transitions. [2021-06-05 17:06:23,600 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 5719 transitions. Word has length 26 [2021-06-05 17:06:23,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:23,600 INFO L482 AbstractCegarLoop]: Abstraction has 1692 states and 5719 transitions. [2021-06-05 17:06:23,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:23,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 5719 transitions. [2021-06-05 17:06:23,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:23,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:23,602 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:23,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 17:06:23,817 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:23,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:23,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1571862210, now seen corresponding path program 41 times [2021-06-05 17:06:23,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:23,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192089441] [2021-06-05 17:06:23,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:23,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:23,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192089441] [2021-06-05 17:06:23,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192089441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:23,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223917411] [2021-06-05 17:06:23,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:23,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:06:23,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:23,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:06:23,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:24,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:24,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:24,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-05 17:06:24,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:06:24,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:24,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:24,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-06-05 17:06:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:24,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223917411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:24,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:24,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:06:24,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409758701] [2021-06-05 17:06:24,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:24,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:24,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:24,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:24,143 INFO L87 Difference]: Start difference. First operand 1692 states and 5719 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:24,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:24,545 INFO L93 Difference]: Finished difference Result 2410 states and 7909 transitions. [2021-06-05 17:06:24,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:06:24,545 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:24,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:24,548 INFO L225 Difference]: With dead ends: 2410 [2021-06-05 17:06:24,548 INFO L226 Difference]: Without dead ends: 2385 [2021-06-05 17:06:24,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 417.5ms TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:06:24,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-06-05 17:06:24,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1674. [2021-06-05 17:06:24,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.3807531380753137) internal successors, (5656), 1673 states have internal predecessors, (5656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:24,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5656 transitions. [2021-06-05 17:06:24,580 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5656 transitions. Word has length 26 [2021-06-05 17:06:24,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:24,580 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 5656 transitions. [2021-06-05 17:06:24,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:24,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5656 transitions. [2021-06-05 17:06:24,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:24,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:24,582 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:24,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 17:06:24,796 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:24,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:24,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1247883966, now seen corresponding path program 42 times [2021-06-05 17:06:24,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:24,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835335147] [2021-06-05 17:06:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:24,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:24,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835335147] [2021-06-05 17:06:24,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835335147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:24,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172101556] [2021-06-05 17:06:24,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:24,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:06:24,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:24,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 17:06:24,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:25,083 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 17:06:25,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 64 [2021-06-05 17:06:25,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:25,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:25,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:25,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:78, output treesize:77 [2021-06-05 17:06:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:25,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172101556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:25,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:25,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 17:06:25,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644774462] [2021-06-05 17:06:25,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:06:25,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:25,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:06:25,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:06:25,193 INFO L87 Difference]: Start difference. First operand 1674 states and 5656 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:26,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:26,205 INFO L93 Difference]: Finished difference Result 2335 states and 7668 transitions. [2021-06-05 17:06:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:06:26,205 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:26,209 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 17:06:26,209 INFO L226 Difference]: Without dead ends: 2310 [2021-06-05 17:06:26,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 703.1ms TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 17:06:26,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-06-05 17:06:26,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1662. [2021-06-05 17:06:26,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.3798916315472605) internal successors, (5614), 1661 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:26,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5614 transitions. [2021-06-05 17:06:26,231 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5614 transitions. Word has length 26 [2021-06-05 17:06:26,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:26,231 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 5614 transitions. [2021-06-05 17:06:26,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:26,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5614 transitions. [2021-06-05 17:06:26,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:26,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:26,233 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:26,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 17:06:26,434 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:26,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:26,434 INFO L82 PathProgramCache]: Analyzing trace with hash 518793590, now seen corresponding path program 43 times [2021-06-05 17:06:26,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:26,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226700909] [2021-06-05 17:06:26,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:26,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:26,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226700909] [2021-06-05 17:06:26,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226700909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:26,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714670068] [2021-06-05 17:06:26,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:26,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:06:26,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:26,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:26,712 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-06-05 17:06:26,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 52 [2021-06-05 17:06:26,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:26,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:26,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:26,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:22 [2021-06-05 17:06:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:26,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714670068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:26,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:26,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:06:26,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929866205] [2021-06-05 17:06:26,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:26,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:26,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:26,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:26,771 INFO L87 Difference]: Start difference. First operand 1662 states and 5614 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:27,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:27,501 INFO L93 Difference]: Finished difference Result 2261 states and 7456 transitions. [2021-06-05 17:06:27,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:06:27,501 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:27,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:27,505 INFO L225 Difference]: With dead ends: 2261 [2021-06-05 17:06:27,505 INFO L226 Difference]: Without dead ends: 2242 [2021-06-05 17:06:27,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 646.7ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:06:27,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-06-05 17:06:27,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1649. [2021-06-05 17:06:27,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 3.3780339805825244) internal successors, (5567), 1648 states have internal predecessors, (5567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:27,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 5567 transitions. [2021-06-05 17:06:27,539 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 5567 transitions. Word has length 26 [2021-06-05 17:06:27,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:27,539 INFO L482 AbstractCegarLoop]: Abstraction has 1649 states and 5567 transitions. [2021-06-05 17:06:27,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:27,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 5567 transitions. [2021-06-05 17:06:27,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:27,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:27,541 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:27,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:27,742 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:27,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:27,742 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 44 times [2021-06-05 17:06:27,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:27,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804409318] [2021-06-05 17:06:27,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:27,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:27,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804409318] [2021-06-05 17:06:27,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804409318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:27,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168191553] [2021-06-05 17:06:27,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:27,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:06:27,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:27,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:06:27,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:28,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:28,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:28,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 17:06:28,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:28,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:28,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:28,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 17:06:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:28,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168191553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:28,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:28,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:06:28,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685080861] [2021-06-05 17:06:28,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:28,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:28,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:28,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:28,047 INFO L87 Difference]: Start difference. First operand 1649 states and 5567 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:28,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:28,548 INFO L93 Difference]: Finished difference Result 2219 states and 7297 transitions. [2021-06-05 17:06:28,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:06:28,549 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:28,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:28,552 INFO L225 Difference]: With dead ends: 2219 [2021-06-05 17:06:28,552 INFO L226 Difference]: Without dead ends: 2204 [2021-06-05 17:06:28,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 494.2ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-06-05 17:06:28,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-06-05 17:06:28,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1700. [2021-06-05 17:06:28,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 3.3737492642731017) internal successors, (5732), 1699 states have internal predecessors, (5732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:28,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 5732 transitions. [2021-06-05 17:06:28,576 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 5732 transitions. Word has length 26 [2021-06-05 17:06:28,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:28,576 INFO L482 AbstractCegarLoop]: Abstraction has 1700 states and 5732 transitions. [2021-06-05 17:06:28,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:28,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 5732 transitions. [2021-06-05 17:06:28,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:28,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:28,578 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:28,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 17:06:28,778 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:28,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:28,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1930035334, now seen corresponding path program 45 times [2021-06-05 17:06:28,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:28,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69543441] [2021-06-05 17:06:28,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:28,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:28,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69543441] [2021-06-05 17:06:28,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69543441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:28,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70266064] [2021-06-05 17:06:28,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:28,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:06:28,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:28,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:06:28,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:29,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:29,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:29,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 17:06:29,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:29,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:29,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:06:29,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:75 [2021-06-05 17:06:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:29,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70266064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:29,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:29,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:06:29,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163288553] [2021-06-05 17:06:29,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:29,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:29,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:29,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:29,144 INFO L87 Difference]: Start difference. First operand 1700 states and 5732 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:29,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:29,543 INFO L93 Difference]: Finished difference Result 2458 states and 8075 transitions. [2021-06-05 17:06:29,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:06:29,543 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:29,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:29,547 INFO L225 Difference]: With dead ends: 2458 [2021-06-05 17:06:29,547 INFO L226 Difference]: Without dead ends: 2443 [2021-06-05 17:06:29,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 454.9ms TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:06:29,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2021-06-05 17:06:29,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 1695. [2021-06-05 17:06:29,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 3.374852420306966) internal successors, (5717), 1694 states have internal predecessors, (5717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 5717 transitions. [2021-06-05 17:06:29,572 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 5717 transitions. Word has length 26 [2021-06-05 17:06:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:29,573 INFO L482 AbstractCegarLoop]: Abstraction has 1695 states and 5717 transitions. [2021-06-05 17:06:29,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 5717 transitions. [2021-06-05 17:06:29,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:29,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:29,575 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:29,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:29,775 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:29,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:29,775 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 46 times [2021-06-05 17:06:29,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:29,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075250742] [2021-06-05 17:06:29,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:29,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:29,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075250742] [2021-06-05 17:06:29,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075250742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:29,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009428077] [2021-06-05 17:06:29,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:29,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:06:29,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:29,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:06:29,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:30,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:30,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:30,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 17:06:30,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:30,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:30,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:30,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 17:06:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:30,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009428077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:30,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:30,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:06:30,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186227615] [2021-06-05 17:06:30,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:30,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:30,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:30,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:30,096 INFO L87 Difference]: Start difference. First operand 1695 states and 5717 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:30,601 INFO L93 Difference]: Finished difference Result 2251 states and 7431 transitions. [2021-06-05 17:06:30,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:06:30,602 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:30,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:30,605 INFO L225 Difference]: With dead ends: 2251 [2021-06-05 17:06:30,605 INFO L226 Difference]: Without dead ends: 2236 [2021-06-05 17:06:30,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 467.2ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:06:30,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-06-05 17:06:30,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1698. [2021-06-05 17:06:30,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 3.3783146729522686) internal successors, (5733), 1697 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 5733 transitions. [2021-06-05 17:06:30,626 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 5733 transitions. Word has length 26 [2021-06-05 17:06:30,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:30,626 INFO L482 AbstractCegarLoop]: Abstraction has 1698 states and 5733 transitions. [2021-06-05 17:06:30,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:30,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 5733 transitions. [2021-06-05 17:06:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:30,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:30,628 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:30,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 17:06:30,845 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:30,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:30,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 47 times [2021-06-05 17:06:30,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:30,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741594763] [2021-06-05 17:06:30,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:30,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:30,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741594763] [2021-06-05 17:06:30,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741594763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:30,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238778630] [2021-06-05 17:06:30,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:30,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:06:30,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:30,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:06:30,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:31,156 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 17:06:31,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 49 [2021-06-05 17:06:31,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:31,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:31,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:31,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-06-05 17:06:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:31,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238778630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:31,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:31,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:06:31,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509266841] [2021-06-05 17:06:31,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:31,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:31,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:31,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:31,183 INFO L87 Difference]: Start difference. First operand 1698 states and 5733 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:31,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:31,694 INFO L93 Difference]: Finished difference Result 2287 states and 7544 transitions. [2021-06-05 17:06:31,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:06:31,694 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:31,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:31,697 INFO L225 Difference]: With dead ends: 2287 [2021-06-05 17:06:31,697 INFO L226 Difference]: Without dead ends: 2272 [2021-06-05 17:06:31,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 465.0ms TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:06:31,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-06-05 17:06:31,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1716. [2021-06-05 17:06:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 3.3743440233236153) internal successors, (5787), 1715 states have internal predecessors, (5787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5787 transitions. [2021-06-05 17:06:31,720 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5787 transitions. Word has length 26 [2021-06-05 17:06:31,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:31,720 INFO L482 AbstractCegarLoop]: Abstraction has 1716 states and 5787 transitions. [2021-06-05 17:06:31,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:31,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5787 transitions. [2021-06-05 17:06:31,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:31,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:31,722 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:31,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 17:06:31,938 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:31,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:31,938 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 48 times [2021-06-05 17:06:31,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:31,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016826743] [2021-06-05 17:06:31,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:32,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:32,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016826743] [2021-06-05 17:06:32,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016826743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:32,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169565747] [2021-06-05 17:06:32,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:32,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:06:32,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:32,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:06:32,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:32,258 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 17:06:32,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-05 17:06:32,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:32,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:32,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:32,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:17 [2021-06-05 17:06:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:32,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169565747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:32,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:32,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:06:32,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430418497] [2021-06-05 17:06:32,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:32,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:32,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:32,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:32,300 INFO L87 Difference]: Start difference. First operand 1716 states and 5787 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:33,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:33,043 INFO L93 Difference]: Finished difference Result 2276 states and 7538 transitions. [2021-06-05 17:06:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:06:33,043 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:33,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:33,047 INFO L225 Difference]: With dead ends: 2276 [2021-06-05 17:06:33,047 INFO L226 Difference]: Without dead ends: 2261 [2021-06-05 17:06:33,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 616.0ms TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:06:33,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-06-05 17:06:33,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1734. [2021-06-05 17:06:33,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.3721869590305826) internal successors, (5844), 1733 states have internal predecessors, (5844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:33,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5844 transitions. [2021-06-05 17:06:33,069 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5844 transitions. Word has length 26 [2021-06-05 17:06:33,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:33,069 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5844 transitions. [2021-06-05 17:06:33,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:33,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5844 transitions. [2021-06-05 17:06:33,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:33,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:33,071 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:33,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 17:06:33,272 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:33,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:33,273 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 49 times [2021-06-05 17:06:33,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:33,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513365835] [2021-06-05 17:06:33,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:33,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:33,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513365835] [2021-06-05 17:06:33,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513365835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:33,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200504532] [2021-06-05 17:06:33,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:33,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:06:33,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:33,544 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 17:06:33,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 54 [2021-06-05 17:06:33,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:33,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:33,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:06:33,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:67 [2021-06-05 17:06:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:33,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200504532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:33,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:33,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:06:33,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466487867] [2021-06-05 17:06:33,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:33,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:33,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:33,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:33,632 INFO L87 Difference]: Start difference. First operand 1734 states and 5844 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:34,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:34,046 INFO L93 Difference]: Finished difference Result 2329 states and 7683 transitions. [2021-06-05 17:06:34,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:06:34,047 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:34,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:34,050 INFO L225 Difference]: With dead ends: 2329 [2021-06-05 17:06:34,050 INFO L226 Difference]: Without dead ends: 2304 [2021-06-05 17:06:34,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 424.1ms TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:06:34,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-06-05 17:06:34,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 1734. [2021-06-05 17:06:34,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.3744950952106176) internal successors, (5848), 1733 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:34,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5848 transitions. [2021-06-05 17:06:34,074 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5848 transitions. Word has length 26 [2021-06-05 17:06:34,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:34,074 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5848 transitions. [2021-06-05 17:06:34,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:34,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5848 transitions. [2021-06-05 17:06:34,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:34,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:34,077 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:34,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-05 17:06:34,277 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:34,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:34,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 50 times [2021-06-05 17:06:34,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:34,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857520002] [2021-06-05 17:06:34,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:34,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:34,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857520002] [2021-06-05 17:06:34,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857520002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:34,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387114224] [2021-06-05 17:06:34,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:34,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:06:34,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:34,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:06:34,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:34,528 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 17:06:34,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-05 17:06:34,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:34,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:34,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:34,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:17 [2021-06-05 17:06:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:34,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387114224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:34,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:34,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:06:34,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493226684] [2021-06-05 17:06:34,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:34,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:34,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:34,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:34,574 INFO L87 Difference]: Start difference. First operand 1734 states and 5848 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:35,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:35,005 INFO L93 Difference]: Finished difference Result 2281 states and 7556 transitions. [2021-06-05 17:06:35,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:06:35,005 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:35,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:35,008 INFO L225 Difference]: With dead ends: 2281 [2021-06-05 17:06:35,008 INFO L226 Difference]: Without dead ends: 2266 [2021-06-05 17:06:35,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 424.2ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:06:35,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-06-05 17:06:35,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 1734. [2021-06-05 17:06:35,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.3744950952106176) internal successors, (5848), 1733 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:35,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5848 transitions. [2021-06-05 17:06:35,029 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5848 transitions. Word has length 26 [2021-06-05 17:06:35,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:35,029 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5848 transitions. [2021-06-05 17:06:35,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:35,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5848 transitions. [2021-06-05 17:06:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:35,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:35,031 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:35,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:35,232 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:35,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:35,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1909155608, now seen corresponding path program 56 times [2021-06-05 17:06:35,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:35,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065066307] [2021-06-05 17:06:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:35,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:35,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065066307] [2021-06-05 17:06:35,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065066307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:35,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222502705] [2021-06-05 17:06:35,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:35,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:06:35,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:35,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 17:06:35,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:35,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:35,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:35,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:35,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:35,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-06-05 17:06:35,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:35,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:35,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:35,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:15 [2021-06-05 17:06:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:35,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222502705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:35,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:35,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:06:35,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904477195] [2021-06-05 17:06:35,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:35,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:35,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:35,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:35,627 INFO L87 Difference]: Start difference. First operand 1734 states and 5848 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:36,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:36,074 INFO L93 Difference]: Finished difference Result 2265 states and 7364 transitions. [2021-06-05 17:06:36,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 17:06:36,074 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:36,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:36,077 INFO L225 Difference]: With dead ends: 2265 [2021-06-05 17:06:36,077 INFO L226 Difference]: Without dead ends: 2220 [2021-06-05 17:06:36,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 544.2ms TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:06:36,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-06-05 17:06:36,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1752. [2021-06-05 17:06:36,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.366647629925757) internal successors, (5895), 1751 states have internal predecessors, (5895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:36,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5895 transitions. [2021-06-05 17:06:36,099 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5895 transitions. Word has length 26 [2021-06-05 17:06:36,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:36,099 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5895 transitions. [2021-06-05 17:06:36,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:36,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5895 transitions. [2021-06-05 17:06:36,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:36,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:36,101 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:36,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:36,302 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:36,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:36,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1847280054, now seen corresponding path program 57 times [2021-06-05 17:06:36,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:36,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056768062] [2021-06-05 17:06:36,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:36,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:36,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056768062] [2021-06-05 17:06:36,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056768062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:36,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225063823] [2021-06-05 17:06:36,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:36,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:06:36,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:36,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:06:36,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:36,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:36,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:36,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:36,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:36,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-06-05 17:06:36,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:06:36,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:36,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:36,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:33 [2021-06-05 17:06:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:36,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225063823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:36,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:36,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:06:36,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711534878] [2021-06-05 17:06:36,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:06:36,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:36,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:06:36,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:06:36,746 INFO L87 Difference]: Start difference. First operand 1752 states and 5895 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:38,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:38,248 INFO L93 Difference]: Finished difference Result 2446 states and 7986 transitions. [2021-06-05 17:06:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 17:06:38,249 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:38,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:38,252 INFO L225 Difference]: With dead ends: 2446 [2021-06-05 17:06:38,252 INFO L226 Difference]: Without dead ends: 2431 [2021-06-05 17:06:38,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1260.0ms TimeCoverageRelationStatistics Valid=360, Invalid=1802, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:06:38,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-06-05 17:06:38,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1746. [2021-06-05 17:06:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 3.3650429799426935) internal successors, (5872), 1745 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 5872 transitions. [2021-06-05 17:06:38,273 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 5872 transitions. Word has length 26 [2021-06-05 17:06:38,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:38,273 INFO L482 AbstractCegarLoop]: Abstraction has 1746 states and 5872 transitions. [2021-06-05 17:06:38,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:38,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 5872 transitions. [2021-06-05 17:06:38,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:38,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:38,275 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:38,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 17:06:38,476 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:38,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:38,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 58 times [2021-06-05 17:06:38,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:38,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232042861] [2021-06-05 17:06:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:38,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:38,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232042861] [2021-06-05 17:06:38,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232042861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:38,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183447670] [2021-06-05 17:06:38,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:38,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:06:38,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:38,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:06:38,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:38,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:38,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:38,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:38,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:38,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 17:06:38,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:38,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:38,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:38,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 17:06:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:38,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183447670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:38,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:38,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 17:06:38,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105786643] [2021-06-05 17:06:38,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:06:38,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:38,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:06:38,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:06:38,765 INFO L87 Difference]: Start difference. First operand 1746 states and 5872 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:39,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:39,156 INFO L93 Difference]: Finished difference Result 2059 states and 6675 transitions. [2021-06-05 17:06:39,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:06:39,156 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:39,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:39,159 INFO L225 Difference]: With dead ends: 2059 [2021-06-05 17:06:39,159 INFO L226 Difference]: Without dead ends: 2037 [2021-06-05 17:06:39,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 345.7ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:06:39,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2021-06-05 17:06:39,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1748. [2021-06-05 17:06:39,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 3.36519748139668) internal successors, (5879), 1747 states have internal predecessors, (5879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:39,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 5879 transitions. [2021-06-05 17:06:39,181 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 5879 transitions. Word has length 26 [2021-06-05 17:06:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:39,181 INFO L482 AbstractCegarLoop]: Abstraction has 1748 states and 5879 transitions. [2021-06-05 17:06:39,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 5879 transitions. [2021-06-05 17:06:39,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:39,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:39,183 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:39,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:39,386 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:39,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:39,386 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 59 times [2021-06-05 17:06:39,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:39,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339209610] [2021-06-05 17:06:39,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:39,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:39,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339209610] [2021-06-05 17:06:39,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339209610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:39,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689980251] [2021-06-05 17:06:39,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:39,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:06:39,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:39,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:06:39,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:39,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:39,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:39,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:39,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:39,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-06-05 17:06:39,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:06:39,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:39,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:39,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:33 [2021-06-05 17:06:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:39,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689980251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:39,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:39,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:06:39,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917308709] [2021-06-05 17:06:39,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:06:39,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:39,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:06:39,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:06:39,795 INFO L87 Difference]: Start difference. First operand 1748 states and 5879 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:40,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:40,667 INFO L93 Difference]: Finished difference Result 2318 states and 7610 transitions. [2021-06-05 17:06:40,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:06:40,667 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:40,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:40,670 INFO L225 Difference]: With dead ends: 2318 [2021-06-05 17:06:40,670 INFO L226 Difference]: Without dead ends: 2276 [2021-06-05 17:06:40,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 764.1ms TimeCoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 17:06:40,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-06-05 17:06:40,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 1772. [2021-06-05 17:06:40,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 3.3585544889892716) internal successors, (5948), 1771 states have internal predecessors, (5948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:40,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 5948 transitions. [2021-06-05 17:06:40,692 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 5948 transitions. Word has length 26 [2021-06-05 17:06:40,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:40,692 INFO L482 AbstractCegarLoop]: Abstraction has 1772 states and 5948 transitions. [2021-06-05 17:06:40,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 5948 transitions. [2021-06-05 17:06:40,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:40,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:40,694 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:40,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:40,894 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:40,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:40,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1162419966, now seen corresponding path program 60 times [2021-06-05 17:06:40,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:40,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698131315] [2021-06-05 17:06:40,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:41,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:41,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698131315] [2021-06-05 17:06:41,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698131315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:41,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278860061] [2021-06-05 17:06:41,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:41,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:06:41,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:41,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:06:41,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:41,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:41,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:41,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:41,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 17:06:41,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:41,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:41,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:41,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 17:06:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:41,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278860061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:41,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:41,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 17:06:41,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757119512] [2021-06-05 17:06:41,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:06:41,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:41,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:06:41,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:06:41,229 INFO L87 Difference]: Start difference. First operand 1772 states and 5948 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:41,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:41,729 INFO L93 Difference]: Finished difference Result 2209 states and 7265 transitions. [2021-06-05 17:06:41,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:06:41,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:41,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:41,733 INFO L225 Difference]: With dead ends: 2209 [2021-06-05 17:06:41,733 INFO L226 Difference]: Without dead ends: 2178 [2021-06-05 17:06:41,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 457.1ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:06:41,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2021-06-05 17:06:41,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 1768. [2021-06-05 17:06:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 3.3604980192416525) internal successors, (5938), 1767 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:41,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5938 transitions. [2021-06-05 17:06:41,758 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5938 transitions. Word has length 26 [2021-06-05 17:06:41,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:41,758 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 5938 transitions. [2021-06-05 17:06:41,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:41,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5938 transitions. [2021-06-05 17:06:41,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:41,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:41,761 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:41,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:41,961 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:41,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:41,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 61 times [2021-06-05 17:06:41,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:41,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184090753] [2021-06-05 17:06:41,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:42,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:42,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184090753] [2021-06-05 17:06:42,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184090753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:42,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572440191] [2021-06-05 17:06:42,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:42,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:06:42,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:42,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:42,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:42,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:42,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 17:06:42,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:42,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:42,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:42,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 17:06:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:42,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572440191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:42,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:42,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 17:06:42,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296999848] [2021-06-05 17:06:42,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:06:42,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:42,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:06:42,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:06:42,261 INFO L87 Difference]: Start difference. First operand 1768 states and 5938 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:42,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:42,597 INFO L93 Difference]: Finished difference Result 2198 states and 7242 transitions. [2021-06-05 17:06:42,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:06:42,597 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:42,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:42,600 INFO L225 Difference]: With dead ends: 2198 [2021-06-05 17:06:42,600 INFO L226 Difference]: Without dead ends: 2183 [2021-06-05 17:06:42,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 402.7ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:06:42,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2183 states. [2021-06-05 17:06:42,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2183 to 1768. [2021-06-05 17:06:42,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 3.3604980192416525) internal successors, (5938), 1767 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:42,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5938 transitions. [2021-06-05 17:06:42,620 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5938 transitions. Word has length 26 [2021-06-05 17:06:42,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:42,620 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 5938 transitions. [2021-06-05 17:06:42,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:42,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5938 transitions. [2021-06-05 17:06:42,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:42,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:42,622 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:42,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-05 17:06:42,823 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:42,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:42,823 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 51 times [2021-06-05 17:06:42,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:42,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691724063] [2021-06-05 17:06:42,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:42,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:42,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691724063] [2021-06-05 17:06:42,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691724063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:42,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374971697] [2021-06-05 17:06:42,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:43,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:06:43,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:43,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:06:43,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:43,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:43,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:43,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 17:06:43,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:43,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:43,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:43,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 17:06:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:43,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374971697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:43,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:43,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:06:43,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452917096] [2021-06-05 17:06:43,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:06:43,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:43,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:06:43,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:06:43,191 INFO L87 Difference]: Start difference. First operand 1768 states and 5938 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:44,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:44,097 INFO L93 Difference]: Finished difference Result 2386 states and 7756 transitions. [2021-06-05 17:06:44,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 17:06:44,097 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:44,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:44,100 INFO L225 Difference]: With dead ends: 2386 [2021-06-05 17:06:44,100 INFO L226 Difference]: Without dead ends: 2371 [2021-06-05 17:06:44,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 647.1ms TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:06:44,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-06-05 17:06:44,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1779. [2021-06-05 17:06:44,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1778 states have (on average 3.361079865016873) internal successors, (5976), 1778 states have internal predecessors, (5976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:44,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 5976 transitions. [2021-06-05 17:06:44,121 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 5976 transitions. Word has length 26 [2021-06-05 17:06:44,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:44,122 INFO L482 AbstractCegarLoop]: Abstraction has 1779 states and 5976 transitions. [2021-06-05 17:06:44,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:44,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 5976 transitions. [2021-06-05 17:06:44,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:44,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:44,124 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:44,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:44,337 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:44,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:44,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 62 times [2021-06-05 17:06:44,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:44,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447997172] [2021-06-05 17:06:44,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:44,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:44,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447997172] [2021-06-05 17:06:44,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447997172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:44,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25290752] [2021-06-05 17:06:44,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:44,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:06:44,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:44,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:06:44,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:44,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:44,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:44,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:44,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 17:06:44,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:44,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:44,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:44,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 17:06:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:44,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25290752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:44,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:44,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:06:44,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495029030] [2021-06-05 17:06:44,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:06:44,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:44,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:06:44,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:06:44,626 INFO L87 Difference]: Start difference. First operand 1779 states and 5976 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:45,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:45,337 INFO L93 Difference]: Finished difference Result 2670 states and 8464 transitions. [2021-06-05 17:06:45,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:06:45,337 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:45,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:45,341 INFO L225 Difference]: With dead ends: 2670 [2021-06-05 17:06:45,341 INFO L226 Difference]: Without dead ends: 2648 [2021-06-05 17:06:45,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 589.0ms TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:06:45,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-06-05 17:06:45,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1831. [2021-06-05 17:06:45,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1830 states have (on average 3.3666666666666667) internal successors, (6161), 1830 states have internal predecessors, (6161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:45,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 6161 transitions. [2021-06-05 17:06:45,367 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 6161 transitions. Word has length 26 [2021-06-05 17:06:45,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:45,368 INFO L482 AbstractCegarLoop]: Abstraction has 1831 states and 6161 transitions. [2021-06-05 17:06:45,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:45,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 6161 transitions. [2021-06-05 17:06:45,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:45,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:45,370 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:45,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:45,570 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:45,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:45,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 52 times [2021-06-05 17:06:45,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:45,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997788127] [2021-06-05 17:06:45,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:45,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:45,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997788127] [2021-06-05 17:06:45,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997788127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:45,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100676945] [2021-06-05 17:06:45,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:45,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:06:45,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:45,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:06:45,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:45,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:45,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:45,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 17:06:45,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:45,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:45,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:45,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 17:06:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:46,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100676945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:46,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:46,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:06:46,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654331892] [2021-06-05 17:06:46,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:06:46,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:46,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:06:46,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:06:46,007 INFO L87 Difference]: Start difference. First operand 1831 states and 6161 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:46,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:46,960 INFO L93 Difference]: Finished difference Result 2547 states and 8275 transitions. [2021-06-05 17:06:46,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:06:46,961 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:46,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:46,964 INFO L225 Difference]: With dead ends: 2547 [2021-06-05 17:06:46,964 INFO L226 Difference]: Without dead ends: 2532 [2021-06-05 17:06:46,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 734.5ms TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:06:46,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-06-05 17:06:46,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1836. [2021-06-05 17:06:46,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1835 states have (on average 3.3678474114441417) internal successors, (6180), 1835 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:46,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 6180 transitions. [2021-06-05 17:06:46,986 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 6180 transitions. Word has length 26 [2021-06-05 17:06:46,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:46,986 INFO L482 AbstractCegarLoop]: Abstraction has 1836 states and 6180 transitions. [2021-06-05 17:06:46,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:46,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 6180 transitions. [2021-06-05 17:06:46,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:46,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:46,988 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:47,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:47,189 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:47,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:47,189 INFO L82 PathProgramCache]: Analyzing trace with hash 152195194, now seen corresponding path program 53 times [2021-06-05 17:06:47,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:47,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183316801] [2021-06-05 17:06:47,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:47,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:47,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:47,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183316801] [2021-06-05 17:06:47,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183316801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:47,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088011042] [2021-06-05 17:06:47,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:47,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:06:47,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:47,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 17:06:47,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:47,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:47,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:47,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-05 17:06:47,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:06:47,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:47,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:47,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-06-05 17:06:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:47,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088011042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:47,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:47,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:06:47,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898158677] [2021-06-05 17:06:47,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:47,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:47,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:47,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:47,514 INFO L87 Difference]: Start difference. First operand 1836 states and 6180 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:48,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:48,545 INFO L93 Difference]: Finished difference Result 2824 states and 9165 transitions. [2021-06-05 17:06:48,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:06:48,545 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:48,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:48,549 INFO L225 Difference]: With dead ends: 2824 [2021-06-05 17:06:48,549 INFO L226 Difference]: Without dead ends: 2809 [2021-06-05 17:06:48,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 756.3ms TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:06:48,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2021-06-05 17:06:48,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 1827. [2021-06-05 17:06:48,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.3663745892661554) internal successors, (6147), 1826 states have internal predecessors, (6147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:48,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6147 transitions. [2021-06-05 17:06:48,583 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6147 transitions. Word has length 26 [2021-06-05 17:06:48,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:48,583 INFO L482 AbstractCegarLoop]: Abstraction has 1827 states and 6147 transitions. [2021-06-05 17:06:48,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:48,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6147 transitions. [2021-06-05 17:06:48,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:48,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:48,585 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:48,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:48,785 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:48,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:48,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 63 times [2021-06-05 17:06:48,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:48,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128894616] [2021-06-05 17:06:48,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:48,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:48,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128894616] [2021-06-05 17:06:48,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128894616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:48,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813632466] [2021-06-05 17:06:48,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:48,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:06:48,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:48,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:06:48,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:49,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:49,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:49,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:49,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:49,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 17:06:49,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:49,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:49,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:49,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 17:06:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:49,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813632466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:49,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:49,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 17:06:49,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163926583] [2021-06-05 17:06:49,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:06:49,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:49,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:06:49,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:06:49,059 INFO L87 Difference]: Start difference. First operand 1827 states and 6147 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:49,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:49,764 INFO L93 Difference]: Finished difference Result 3158 states and 10100 transitions. [2021-06-05 17:06:49,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:06:49,764 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:49,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:49,769 INFO L225 Difference]: With dead ends: 3158 [2021-06-05 17:06:49,769 INFO L226 Difference]: Without dead ends: 3128 [2021-06-05 17:06:49,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 565.9ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:06:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3128 states. [2021-06-05 17:06:49,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3128 to 1885. [2021-06-05 17:06:49,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 3.3694267515923566) internal successors, (6348), 1884 states have internal predecessors, (6348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:49,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6348 transitions. [2021-06-05 17:06:49,799 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6348 transitions. Word has length 26 [2021-06-05 17:06:49,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:49,799 INFO L482 AbstractCegarLoop]: Abstraction has 1885 states and 6348 transitions. [2021-06-05 17:06:49,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:49,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6348 transitions. [2021-06-05 17:06:49,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:49,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:49,801 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:50,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:50,002 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:50,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:50,002 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 64 times [2021-06-05 17:06:50,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:50,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645084451] [2021-06-05 17:06:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:50,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:50,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645084451] [2021-06-05 17:06:50,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645084451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:50,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648733127] [2021-06-05 17:06:50,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:50,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:06:50,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:50,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:06:50,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:50,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:50,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:50,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:50,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-05 17:06:50,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:06:50,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:50,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:50,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-06-05 17:06:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:50,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648733127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:50,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:50,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 17:06:50,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019293742] [2021-06-05 17:06:50,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:06:50,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:50,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:06:50,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:06:50,321 INFO L87 Difference]: Start difference. First operand 1885 states and 6348 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:51,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:51,349 INFO L93 Difference]: Finished difference Result 3602 states and 11423 transitions. [2021-06-05 17:06:51,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:06:51,349 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:51,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:51,354 INFO L225 Difference]: With dead ends: 3602 [2021-06-05 17:06:51,354 INFO L226 Difference]: Without dead ends: 3558 [2021-06-05 17:06:51,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 894.1ms TimeCoverageRelationStatistics Valid=345, Invalid=1295, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:06:51,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2021-06-05 17:06:51,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 1897. [2021-06-05 17:06:51,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1896 states have (on average 3.37289029535865) internal successors, (6395), 1896 states have internal predecessors, (6395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:51,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 6395 transitions. [2021-06-05 17:06:51,393 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 6395 transitions. Word has length 26 [2021-06-05 17:06:51,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:51,393 INFO L482 AbstractCegarLoop]: Abstraction has 1897 states and 6395 transitions. [2021-06-05 17:06:51,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:51,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 6395 transitions. [2021-06-05 17:06:51,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:51,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:51,395 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:51,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 17:06:51,596 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:51,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:51,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1345416738, now seen corresponding path program 54 times [2021-06-05 17:06:51,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:51,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906112146] [2021-06-05 17:06:51,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:51,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:51,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906112146] [2021-06-05 17:06:51,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906112146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:51,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271903055] [2021-06-05 17:06:51,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:51,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:06:51,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:51,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:06:51,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:51,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:51,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:51,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:51,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2021-06-05 17:06:51,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:06:51,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:51,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:51,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-06-05 17:06:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:51,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271903055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:51,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:51,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:06:51,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305108834] [2021-06-05 17:06:51,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:51,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:51,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:51,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:51,913 INFO L87 Difference]: Start difference. First operand 1897 states and 6395 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:53,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:53,057 INFO L93 Difference]: Finished difference Result 2547 states and 8408 transitions. [2021-06-05 17:06:53,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:06:53,058 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:53,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:53,061 INFO L225 Difference]: With dead ends: 2547 [2021-06-05 17:06:53,061 INFO L226 Difference]: Without dead ends: 2532 [2021-06-05 17:06:53,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 842.9ms TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:06:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-06-05 17:06:53,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1907. [2021-06-05 17:06:53,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1906 states have (on average 3.3698845750262327) internal successors, (6423), 1906 states have internal predecessors, (6423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 6423 transitions. [2021-06-05 17:06:53,085 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 6423 transitions. Word has length 26 [2021-06-05 17:06:53,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:53,085 INFO L482 AbstractCegarLoop]: Abstraction has 1907 states and 6423 transitions. [2021-06-05 17:06:53,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:53,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 6423 transitions. [2021-06-05 17:06:53,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:53,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:53,088 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:53,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable284 [2021-06-05 17:06:53,288 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:53,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:53,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 55 times [2021-06-05 17:06:53,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:53,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150984508] [2021-06-05 17:06:53,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:53,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:53,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150984508] [2021-06-05 17:06:53,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150984508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:53,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073380915] [2021-06-05 17:06:53,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:53,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:06:53,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:53,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:53,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:53,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 17:06:53,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:53,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:53,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:06:53,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:75 [2021-06-05 17:06:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:53,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073380915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:53,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:53,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:06:53,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36653585] [2021-06-05 17:06:53,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:06:53,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:53,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:06:53,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:06:53,635 INFO L87 Difference]: Start difference. First operand 1907 states and 6423 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:54,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:54,337 INFO L93 Difference]: Finished difference Result 2690 states and 8822 transitions. [2021-06-05 17:06:54,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:06:54,337 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:54,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:54,341 INFO L225 Difference]: With dead ends: 2690 [2021-06-05 17:06:54,341 INFO L226 Difference]: Without dead ends: 2665 [2021-06-05 17:06:54,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 581.4ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 17:06:54,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-06-05 17:06:54,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1893. [2021-06-05 17:06:54,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 3.374735729386892) internal successors, (6385), 1892 states have internal predecessors, (6385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 6385 transitions. [2021-06-05 17:06:54,369 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 6385 transitions. Word has length 26 [2021-06-05 17:06:54,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:54,369 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 6385 transitions. [2021-06-05 17:06:54,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:54,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 6385 transitions. [2021-06-05 17:06:54,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:54,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:54,372 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:54,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:54,574 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:54,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:54,574 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 65 times [2021-06-05 17:06:54,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:54,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740883126] [2021-06-05 17:06:54,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:54,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:54,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740883126] [2021-06-05 17:06:54,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740883126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:54,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529754977] [2021-06-05 17:06:54,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:54,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:06:54,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:54,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:06:54,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:54,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:54,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:54,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:54,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 17:06:54,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:54,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:54,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:54,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 17:06:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:54,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529754977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:54,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:54,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:06:54,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943124623] [2021-06-05 17:06:54,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:06:54,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:54,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:06:54,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:06:54,926 INFO L87 Difference]: Start difference. First operand 1893 states and 6385 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:55,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:55,741 INFO L93 Difference]: Finished difference Result 2560 states and 8375 transitions. [2021-06-05 17:06:55,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:06:55,741 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:55,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:55,745 INFO L225 Difference]: With dead ends: 2560 [2021-06-05 17:06:55,745 INFO L226 Difference]: Without dead ends: 2538 [2021-06-05 17:06:55,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 774.9ms TimeCoverageRelationStatistics Valid=253, Invalid=1007, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 17:06:55,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2021-06-05 17:06:55,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 1893. [2021-06-05 17:06:55,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 3.375264270613108) internal successors, (6386), 1892 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 6386 transitions. [2021-06-05 17:06:55,779 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 6386 transitions. Word has length 26 [2021-06-05 17:06:55,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:55,779 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 6386 transitions. [2021-06-05 17:06:55,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:55,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 6386 transitions. [2021-06-05 17:06:55,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:55,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:55,782 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:55,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:55,982 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:55,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:55,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1778019666, now seen corresponding path program 66 times [2021-06-05 17:06:55,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:55,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592017085] [2021-06-05 17:06:55,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:56,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:56,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592017085] [2021-06-05 17:06:56,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592017085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:56,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779482842] [2021-06-05 17:06:56,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:56,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:06:56,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:56,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 17:06:56,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:56,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:56,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:56,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:56,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 17:06:56,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:06:56,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:56,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:56,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:26 [2021-06-05 17:06:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:56,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779482842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:56,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:56,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 17:06:56,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520271929] [2021-06-05 17:06:56,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:06:56,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:56,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:06:56,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:06:56,407 INFO L87 Difference]: Start difference. First operand 1893 states and 6386 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:57,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:57,959 INFO L93 Difference]: Finished difference Result 3121 states and 9982 transitions. [2021-06-05 17:06:57,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 17:06:57,959 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:57,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:57,963 INFO L225 Difference]: With dead ends: 3121 [2021-06-05 17:06:57,963 INFO L226 Difference]: Without dead ends: 3055 [2021-06-05 17:06:57,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1186.4ms TimeCoverageRelationStatistics Valid=387, Invalid=1593, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:06:57,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2021-06-05 17:06:57,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 1882. [2021-06-05 17:06:57,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.3694843168527377) internal successors, (6338), 1881 states have internal predecessors, (6338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:57,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 6338 transitions. [2021-06-05 17:06:57,991 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 6338 transitions. Word has length 26 [2021-06-05 17:06:57,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:57,991 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 6338 transitions. [2021-06-05 17:06:57,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:57,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 6338 transitions. [2021-06-05 17:06:57,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:57,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:57,993 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:58,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-06-05 17:06:58,194 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:58,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:58,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1066719206, now seen corresponding path program 56 times [2021-06-05 17:06:58,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:58,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091868683] [2021-06-05 17:06:58,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:58,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:58,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091868683] [2021-06-05 17:06:58,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091868683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:58,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088930649] [2021-06-05 17:06:58,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:58,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:06:58,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:58,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:06:58,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:58,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:58,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:58,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-05 17:06:58,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:06:58,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:58,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:58,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-06-05 17:06:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:58,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088930649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:58,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:58,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:06:58,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909975894] [2021-06-05 17:06:58,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:58,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:58,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:58,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:58,505 INFO L87 Difference]: Start difference. First operand 1882 states and 6338 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:59,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:59,354 INFO L93 Difference]: Finished difference Result 2561 states and 8454 transitions. [2021-06-05 17:06:59,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 17:06:59,354 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:06:59,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:59,357 INFO L225 Difference]: With dead ends: 2561 [2021-06-05 17:06:59,358 INFO L226 Difference]: Without dead ends: 2546 [2021-06-05 17:06:59,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 659.8ms TimeCoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:06:59,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-06-05 17:06:59,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 1884. [2021-06-05 17:06:59,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 3.365374402549124) internal successors, (6337), 1883 states have internal predecessors, (6337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:59,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 6337 transitions. [2021-06-05 17:06:59,382 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 6337 transitions. Word has length 26 [2021-06-05 17:06:59,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:59,382 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 6337 transitions. [2021-06-05 17:06:59,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:59,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 6337 transitions. [2021-06-05 17:06:59,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:59,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:59,384 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:59,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:59,586 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:59,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:59,586 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 57 times [2021-06-05 17:06:59,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:59,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780909124] [2021-06-05 17:06:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:59,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:59,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780909124] [2021-06-05 17:06:59,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780909124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:59,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556144618] [2021-06-05 17:06:59,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:59,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:06:59,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:59,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:06:59,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:59,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:59,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:59,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 17:06:59,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:59,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:59,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:06:59,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:67 [2021-06-05 17:06:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:59,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556144618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:59,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:59,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:06:59,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579058100] [2021-06-05 17:06:59,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:59,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:59,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:59,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:59,966 INFO L87 Difference]: Start difference. First operand 1884 states and 6337 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:00,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:00,457 INFO L93 Difference]: Finished difference Result 2552 states and 8397 transitions. [2021-06-05 17:07:00,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:07:00,458 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:07:00,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:00,461 INFO L225 Difference]: With dead ends: 2552 [2021-06-05 17:07:00,461 INFO L226 Difference]: Without dead ends: 2527 [2021-06-05 17:07:00,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 484.9ms TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:07:00,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-06-05 17:07:00,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 1871. [2021-06-05 17:07:00,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 3.36524064171123) internal successors, (6293), 1870 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:00,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6293 transitions. [2021-06-05 17:07:00,486 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6293 transitions. Word has length 26 [2021-06-05 17:07:00,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:00,486 INFO L482 AbstractCegarLoop]: Abstraction has 1871 states and 6293 transitions. [2021-06-05 17:07:00,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:00,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6293 transitions. [2021-06-05 17:07:00,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:07:00,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:00,488 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:00,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 17:07:00,689 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:00,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:00,689 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 58 times [2021-06-05 17:07:00,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:00,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730012636] [2021-06-05 17:07:00,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:00,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:00,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730012636] [2021-06-05 17:07:00,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730012636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:00,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961814037] [2021-06-05 17:07:00,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:00,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:07:00,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:00,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 17:07:00,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:00,964 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 17:07:00,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-05 17:07:00,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:00,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:00,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:07:00,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2021-06-05 17:07:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:01,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961814037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:01,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:01,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:07:01,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70207224] [2021-06-05 17:07:01,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:07:01,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:01,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:07:01,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:07:01,012 INFO L87 Difference]: Start difference. First operand 1871 states and 6293 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:01,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:01,566 INFO L93 Difference]: Finished difference Result 2462 states and 8140 transitions. [2021-06-05 17:07:01,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:07:01,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:07:01,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:01,570 INFO L225 Difference]: With dead ends: 2462 [2021-06-05 17:07:01,570 INFO L226 Difference]: Without dead ends: 2447 [2021-06-05 17:07:01,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 381.7ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:07:01,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-06-05 17:07:01,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1865. [2021-06-05 17:07:01,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 3.3664163090128754) internal successors, (6275), 1864 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:01,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 6275 transitions. [2021-06-05 17:07:01,594 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 6275 transitions. Word has length 26 [2021-06-05 17:07:01,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:01,594 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 6275 transitions. [2021-06-05 17:07:01,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:01,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 6275 transitions. [2021-06-05 17:07:01,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:07:01,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:01,596 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:01,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 17:07:01,796 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:01,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:01,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1210206466, now seen corresponding path program 67 times [2021-06-05 17:07:01,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:01,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422594563] [2021-06-05 17:07:01,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:01,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:01,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422594563] [2021-06-05 17:07:01,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422594563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:01,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111625290] [2021-06-05 17:07:01,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:02,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:07:02,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:02,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:02,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:02,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:02,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 17:07:02,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:02,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:02,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:07:02,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 17:07:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:02,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111625290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:02,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:02,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 17:07:02,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675348698] [2021-06-05 17:07:02,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:07:02,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:02,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:07:02,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:07:02,150 INFO L87 Difference]: Start difference. First operand 1865 states and 6275 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:02,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:02,869 INFO L93 Difference]: Finished difference Result 2375 states and 7798 transitions. [2021-06-05 17:07:02,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:07:02,869 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:07:02,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:02,873 INFO L225 Difference]: With dead ends: 2375 [2021-06-05 17:07:02,873 INFO L226 Difference]: Without dead ends: 2356 [2021-06-05 17:07:02,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 662.0ms TimeCoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2021-06-05 17:07:02,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-06-05 17:07:02,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1855. [2021-06-05 17:07:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1854 states have (on average 3.366774541531823) internal successors, (6242), 1854 states have internal predecessors, (6242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:02,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 6242 transitions. [2021-06-05 17:07:02,898 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 6242 transitions. Word has length 26 [2021-06-05 17:07:02,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:02,898 INFO L482 AbstractCegarLoop]: Abstraction has 1855 states and 6242 transitions. [2021-06-05 17:07:02,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:02,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 6242 transitions. [2021-06-05 17:07:02,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:07:02,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:02,901 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:03,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-06-05 17:07:03,102 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:03,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:03,102 INFO L82 PathProgramCache]: Analyzing trace with hash -89207746, now seen corresponding path program 68 times [2021-06-05 17:07:03,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:03,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255733731] [2021-06-05 17:07:03,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:03,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:03,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:03,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255733731] [2021-06-05 17:07:03,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255733731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:03,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112081499] [2021-06-05 17:07:03,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:03,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:07:03,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:03,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:07:03,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:03,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:03,535 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 17:07:03,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 78 [2021-06-05 17:07:03,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:03,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:03,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:07:03,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:22 [2021-06-05 17:07:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:03,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112081499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:03,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:03,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:07:03,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508713131] [2021-06-05 17:07:03,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:07:03,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:03,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:07:03,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:07:03,592 INFO L87 Difference]: Start difference. First operand 1855 states and 6242 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:04,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:04,404 INFO L93 Difference]: Finished difference Result 2478 states and 8169 transitions. [2021-06-05 17:07:04,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 17:07:04,404 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:07:04,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:04,408 INFO L225 Difference]: With dead ends: 2478 [2021-06-05 17:07:04,408 INFO L226 Difference]: Without dead ends: 2463 [2021-06-05 17:07:04,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 669.1ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:07:04,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-06-05 17:07:04,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1857. [2021-06-05 17:07:04,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 3.3685344827586206) internal successors, (6252), 1856 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:04,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 6252 transitions. [2021-06-05 17:07:04,432 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 6252 transitions. Word has length 26 [2021-06-05 17:07:04,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:04,432 INFO L482 AbstractCegarLoop]: Abstraction has 1857 states and 6252 transitions. [2021-06-05 17:07:04,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:04,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 6252 transitions. [2021-06-05 17:07:04,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:07:04,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:04,434 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:04,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:04,641 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:04,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:04,641 INFO L82 PathProgramCache]: Analyzing trace with hash 503651198, now seen corresponding path program 69 times [2021-06-05 17:07:04,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:04,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315907198] [2021-06-05 17:07:04,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:04,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:04,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315907198] [2021-06-05 17:07:04,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315907198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:04,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340663213] [2021-06-05 17:07:04,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:04,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:07:04,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:04,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:07:04,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:04,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:04,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:04,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:04,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-05 17:07:04,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:07:04,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:04,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:07:04,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-06-05 17:07:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:04,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340663213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:04,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:04,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 17:07:04,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882975597] [2021-06-05 17:07:04,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:07:04,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:04,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:07:04,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:07:04,968 INFO L87 Difference]: Start difference. First operand 1857 states and 6252 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:05,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:05,637 INFO L93 Difference]: Finished difference Result 2626 states and 8587 transitions. [2021-06-05 17:07:05,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:07:05,637 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 17:07:05,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:05,641 INFO L225 Difference]: With dead ends: 2626 [2021-06-05 17:07:05,641 INFO L226 Difference]: Without dead ends: 2596 [2021-06-05 17:07:05,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 602.4ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:07:05,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-06-05 17:07:05,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1857. [2021-06-05 17:07:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 3.3685344827586206) internal successors, (6252), 1856 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:05,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 6252 transitions. [2021-06-05 17:07:05,669 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 6252 transitions. Word has length 26 [2021-06-05 17:07:05,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:05,669 INFO L482 AbstractCegarLoop]: Abstraction has 1857 states and 6252 transitions. [2021-06-05 17:07:05,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 6252 transitions. [2021-06-05 17:07:05,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:05,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:05,672 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:05,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-05 17:07:05,881 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:05,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:05,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 59 times [2021-06-05 17:07:05,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:05,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797051591] [2021-06-05 17:07:05,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:05,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:05,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:05,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797051591] [2021-06-05 17:07:05,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797051591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:05,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120850175] [2021-06-05 17:07:05,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:05,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:07:05,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:05,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:05,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:06,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120850175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:06,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:06,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:07:06,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732222423] [2021-06-05 17:07:06,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:07:06,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:06,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:07:06,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:07:06,045 INFO L87 Difference]: Start difference. First operand 1857 states and 6252 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:06,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:06,941 INFO L93 Difference]: Finished difference Result 4803 states and 14780 transitions. [2021-06-05 17:07:06,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:07:06,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:06,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:06,948 INFO L225 Difference]: With dead ends: 4803 [2021-06-05 17:07:06,948 INFO L226 Difference]: Without dead ends: 4803 [2021-06-05 17:07:06,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 523.3ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 17:07:06,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2021-06-05 17:07:06,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 2054. [2021-06-05 17:07:06,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 3.4305893813930832) internal successors, (7043), 2053 states have internal predecessors, (7043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:06,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 7043 transitions. [2021-06-05 17:07:06,989 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 7043 transitions. Word has length 28 [2021-06-05 17:07:06,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:06,989 INFO L482 AbstractCegarLoop]: Abstraction has 2054 states and 7043 transitions. [2021-06-05 17:07:06,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:06,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 7043 transitions. [2021-06-05 17:07:06,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:06,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:06,992 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:07,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 17:07:07,193 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:07,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:07,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 60 times [2021-06-05 17:07:07,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:07,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654267144] [2021-06-05 17:07:07,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:07,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:07,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654267144] [2021-06-05 17:07:07,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654267144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:07,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835664604] [2021-06-05 17:07:07,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:07,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:07:07,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:07,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:07,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:07,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835664604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:07,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:07,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:07:07,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408860059] [2021-06-05 17:07:07,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:07:07,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:07,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:07:07,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:07:07,401 INFO L87 Difference]: Start difference. First operand 2054 states and 7043 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:08,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:08,547 INFO L93 Difference]: Finished difference Result 6390 states and 19386 transitions. [2021-06-05 17:07:08,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 17:07:08,547 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:08,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:08,556 INFO L225 Difference]: With dead ends: 6390 [2021-06-05 17:07:08,556 INFO L226 Difference]: Without dead ends: 6390 [2021-06-05 17:07:08,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 682.4ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 17:07:08,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6390 states. [2021-06-05 17:07:08,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6390 to 2065. [2021-06-05 17:07:08,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 3.438468992248062) internal successors, (7097), 2064 states have internal predecessors, (7097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:08,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 7097 transitions. [2021-06-05 17:07:08,608 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 7097 transitions. Word has length 28 [2021-06-05 17:07:08,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:08,608 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 7097 transitions. [2021-06-05 17:07:08,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:08,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 7097 transitions. [2021-06-05 17:07:08,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:08,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:08,610 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:08,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 17:07:08,811 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:08,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:08,811 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 61 times [2021-06-05 17:07:08,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:08,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247351373] [2021-06-05 17:07:08,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:08,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:08,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247351373] [2021-06-05 17:07:08,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247351373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:08,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083448389] [2021-06-05 17:07:08,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:08,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:08,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:08,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083448389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:08,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:08,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:07:08,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788135564] [2021-06-05 17:07:08,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:07:08,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:08,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:07:08,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:07:08,968 INFO L87 Difference]: Start difference. First operand 2065 states and 7097 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:10,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:10,075 INFO L93 Difference]: Finished difference Result 5783 states and 17918 transitions. [2021-06-05 17:07:10,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 17:07:10,075 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:10,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:10,084 INFO L225 Difference]: With dead ends: 5783 [2021-06-05 17:07:10,084 INFO L226 Difference]: Without dead ends: 5783 [2021-06-05 17:07:10,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 674.3ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 17:07:10,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5783 states. [2021-06-05 17:07:10,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5783 to 2013. [2021-06-05 17:07:10,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 3.412027833001988) internal successors, (6865), 2012 states have internal predecessors, (6865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:10,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 6865 transitions. [2021-06-05 17:07:10,132 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 6865 transitions. Word has length 28 [2021-06-05 17:07:10,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:10,132 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 6865 transitions. [2021-06-05 17:07:10,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:10,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 6865 transitions. [2021-06-05 17:07:10,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:10,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:10,135 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:10,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable323,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:10,349 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:10,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:10,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 62 times [2021-06-05 17:07:10,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:10,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812687782] [2021-06-05 17:07:10,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:10,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:10,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:10,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812687782] [2021-06-05 17:07:10,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812687782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:10,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789646452] [2021-06-05 17:07:10,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:10,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:07:10,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:10,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:10,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:10,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:10,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789646452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:10,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:10,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:07:10,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895236163] [2021-06-05 17:07:10,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:07:10,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:10,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:07:10,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:07:10,497 INFO L87 Difference]: Start difference. First operand 2013 states and 6865 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:11,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:11,486 INFO L93 Difference]: Finished difference Result 4901 states and 14979 transitions. [2021-06-05 17:07:11,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 17:07:11,486 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:11,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:11,493 INFO L225 Difference]: With dead ends: 4901 [2021-06-05 17:07:11,493 INFO L226 Difference]: Without dead ends: 4901 [2021-06-05 17:07:11,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 584.9ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:07:11,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2021-06-05 17:07:11,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 2023. [2021-06-05 17:07:11,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.408011869436202) internal successors, (6891), 2022 states have internal predecessors, (6891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:11,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 6891 transitions. [2021-06-05 17:07:11,533 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 6891 transitions. Word has length 28 [2021-06-05 17:07:11,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:11,533 INFO L482 AbstractCegarLoop]: Abstraction has 2023 states and 6891 transitions. [2021-06-05 17:07:11,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:11,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 6891 transitions. [2021-06-05 17:07:11,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:11,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:11,535 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:11,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:11,735 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:11,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:11,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 70 times [2021-06-05 17:07:11,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:11,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295133267] [2021-06-05 17:07:11,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:11,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:11,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295133267] [2021-06-05 17:07:11,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295133267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:11,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234359869] [2021-06-05 17:07:11,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:11,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:07:11,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:11,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:11,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:11,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234359869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:11,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:11,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 17:07:11,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167491651] [2021-06-05 17:07:11,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:07:11,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:11,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:07:11,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:07:11,871 INFO L87 Difference]: Start difference. First operand 2023 states and 6891 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:12,409 INFO L93 Difference]: Finished difference Result 4322 states and 13382 transitions. [2021-06-05 17:07:12,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 17:07:12,409 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:12,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:12,415 INFO L225 Difference]: With dead ends: 4322 [2021-06-05 17:07:12,416 INFO L226 Difference]: Without dead ends: 4322 [2021-06-05 17:07:12,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 294.4ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:07:12,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4322 states. [2021-06-05 17:07:12,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4322 to 2079. [2021-06-05 17:07:12,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 3.3946102021174207) internal successors, (7054), 2078 states have internal predecessors, (7054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 7054 transitions. [2021-06-05 17:07:12,455 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 7054 transitions. Word has length 28 [2021-06-05 17:07:12,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:12,455 INFO L482 AbstractCegarLoop]: Abstraction has 2079 states and 7054 transitions. [2021-06-05 17:07:12,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:12,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 7054 transitions. [2021-06-05 17:07:12,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:12,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:12,458 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:12,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-05 17:07:12,659 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:12,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:12,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 63 times [2021-06-05 17:07:12,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:12,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575588081] [2021-06-05 17:07:12,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:12,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:12,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575588081] [2021-06-05 17:07:12,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575588081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:12,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577090394] [2021-06-05 17:07:12,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:12,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:07:12,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:12,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:07:12,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:12,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577090394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:12,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:12,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:07:12,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052186573] [2021-06-05 17:07:12,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:07:12,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:12,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:07:12,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:07:12,766 INFO L87 Difference]: Start difference. First operand 2079 states and 7054 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:12,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:12,919 INFO L93 Difference]: Finished difference Result 3611 states and 11674 transitions. [2021-06-05 17:07:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:07:12,919 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:12,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:12,924 INFO L225 Difference]: With dead ends: 3611 [2021-06-05 17:07:12,924 INFO L226 Difference]: Without dead ends: 3593 [2021-06-05 17:07:12,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:07:12,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-06-05 17:07:12,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 2470. [2021-06-05 17:07:12,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 2469 states have (on average 3.4726609963547994) internal successors, (8574), 2469 states have internal predecessors, (8574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:12,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 8574 transitions. [2021-06-05 17:07:12,958 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 8574 transitions. Word has length 28 [2021-06-05 17:07:12,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:12,958 INFO L482 AbstractCegarLoop]: Abstraction has 2470 states and 8574 transitions. [2021-06-05 17:07:12,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:12,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 8574 transitions. [2021-06-05 17:07:12,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:12,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:12,961 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:13,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 17:07:13,162 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:13,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:13,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 64 times [2021-06-05 17:07:13,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:13,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950935276] [2021-06-05 17:07:13,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:13,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:13,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950935276] [2021-06-05 17:07:13,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950935276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:13,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76943603] [2021-06-05 17:07:13,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:13,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:07:13,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:13,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:07:13,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:13,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76943603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:13,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:13,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 17:07:13,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731571321] [2021-06-05 17:07:13,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:07:13,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:13,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:07:13,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:07:13,285 INFO L87 Difference]: Start difference. First operand 2470 states and 8574 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:13,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:13,804 INFO L93 Difference]: Finished difference Result 4256 states and 13496 transitions. [2021-06-05 17:07:13,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 17:07:13,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:13,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:13,810 INFO L225 Difference]: With dead ends: 4256 [2021-06-05 17:07:13,810 INFO L226 Difference]: Without dead ends: 4209 [2021-06-05 17:07:13,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 311.7ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:07:13,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4209 states. [2021-06-05 17:07:13,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4209 to 2635. [2021-06-05 17:07:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 3.4935459377372817) internal successors, (9202), 2634 states have internal predecessors, (9202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:13,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 9202 transitions. [2021-06-05 17:07:13,851 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 9202 transitions. Word has length 28 [2021-06-05 17:07:13,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:13,851 INFO L482 AbstractCegarLoop]: Abstraction has 2635 states and 9202 transitions. [2021-06-05 17:07:13,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:13,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 9202 transitions. [2021-06-05 17:07:13,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:13,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:13,854 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:14,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:14,055 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:14,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1904037996, now seen corresponding path program 71 times [2021-06-05 17:07:14,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:14,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911457116] [2021-06-05 17:07:14,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:14,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:14,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911457116] [2021-06-05 17:07:14,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911457116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:14,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924110650] [2021-06-05 17:07:14,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:14,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:07:14,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:14,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:14,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:14,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924110650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:14,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:14,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 17:07:14,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840756611] [2021-06-05 17:07:14,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:07:14,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:14,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:07:14,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:07:14,203 INFO L87 Difference]: Start difference. First operand 2635 states and 9202 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:14,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:14,570 INFO L93 Difference]: Finished difference Result 5094 states and 16833 transitions. [2021-06-05 17:07:14,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:07:14,570 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:14,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:14,577 INFO L225 Difference]: With dead ends: 5094 [2021-06-05 17:07:14,577 INFO L226 Difference]: Without dead ends: 5007 [2021-06-05 17:07:14,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 286.9ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:07:14,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5007 states. [2021-06-05 17:07:14,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5007 to 3294. [2021-06-05 17:07:14,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3294 states, 3293 states have (on average 3.5204980261160035) internal successors, (11593), 3293 states have internal predecessors, (11593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:14,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3294 states to 3294 states and 11593 transitions. [2021-06-05 17:07:14,636 INFO L78 Accepts]: Start accepts. Automaton has 3294 states and 11593 transitions. Word has length 28 [2021-06-05 17:07:14,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:14,636 INFO L482 AbstractCegarLoop]: Abstraction has 3294 states and 11593 transitions. [2021-06-05 17:07:14,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:14,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3294 states and 11593 transitions. [2021-06-05 17:07:14,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:14,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:14,640 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:14,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2021-06-05 17:07:14,840 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:14,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:14,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 65 times [2021-06-05 17:07:14,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:14,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494187115] [2021-06-05 17:07:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:14,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:14,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494187115] [2021-06-05 17:07:14,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494187115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:14,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129900878] [2021-06-05 17:07:14,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:14,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:07:14,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:14,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:07:14,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:15,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129900878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:15,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:15,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:07:15,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472870527] [2021-06-05 17:07:15,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:07:15,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:15,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:07:15,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:07:15,009 INFO L87 Difference]: Start difference. First operand 3294 states and 11593 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:15,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:15,618 INFO L93 Difference]: Finished difference Result 5537 states and 17511 transitions. [2021-06-05 17:07:15,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 17:07:15,620 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:15,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:15,628 INFO L225 Difference]: With dead ends: 5537 [2021-06-05 17:07:15,628 INFO L226 Difference]: Without dead ends: 5511 [2021-06-05 17:07:15,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 414.3ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:07:15,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2021-06-05 17:07:15,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 3312. [2021-06-05 17:07:15,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3312 states, 3311 states have (on average 3.5258230141951072) internal successors, (11674), 3311 states have internal predecessors, (11674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:15,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3312 states to 3312 states and 11674 transitions. [2021-06-05 17:07:15,689 INFO L78 Accepts]: Start accepts. Automaton has 3312 states and 11674 transitions. Word has length 28 [2021-06-05 17:07:15,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:15,689 INFO L482 AbstractCegarLoop]: Abstraction has 3312 states and 11674 transitions. [2021-06-05 17:07:15,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:15,690 INFO L276 IsEmpty]: Start isEmpty. Operand 3312 states and 11674 transitions. [2021-06-05 17:07:15,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:15,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:15,693 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:15,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:15,894 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:15,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:15,894 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 66 times [2021-06-05 17:07:15,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:15,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919660584] [2021-06-05 17:07:15,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:15,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:15,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919660584] [2021-06-05 17:07:15,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919660584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:15,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691328014] [2021-06-05 17:07:15,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:15,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:07:15,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:15,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:07:15,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:16,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691328014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:16,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:16,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:07:16,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825434170] [2021-06-05 17:07:16,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:07:16,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:16,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:07:16,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:07:16,028 INFO L87 Difference]: Start difference. First operand 3312 states and 11674 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:16,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:16,648 INFO L93 Difference]: Finished difference Result 5592 states and 17703 transitions. [2021-06-05 17:07:16,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 17:07:16,649 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:16,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:16,657 INFO L225 Difference]: With dead ends: 5592 [2021-06-05 17:07:16,657 INFO L226 Difference]: Without dead ends: 5561 [2021-06-05 17:07:16,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 394.2ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:07:16,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5561 states. [2021-06-05 17:07:16,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5561 to 3305. [2021-06-05 17:07:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 3304 states have (on average 3.5320823244552058) internal successors, (11670), 3304 states have internal predecessors, (11670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:16,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 11670 transitions. [2021-06-05 17:07:16,727 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 11670 transitions. Word has length 28 [2021-06-05 17:07:16,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:16,727 INFO L482 AbstractCegarLoop]: Abstraction has 3305 states and 11670 transitions. [2021-06-05 17:07:16,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:16,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 11670 transitions. [2021-06-05 17:07:16,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:16,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:16,731 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:16,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-05 17:07:16,932 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:16,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:16,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 67 times [2021-06-05 17:07:16,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:16,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115062541] [2021-06-05 17:07:16,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:16,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:16,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115062541] [2021-06-05 17:07:16,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115062541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:16,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75500716] [2021-06-05 17:07:16,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:16,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:07:16,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:17,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75500716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:17,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:17,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:07:17,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951530577] [2021-06-05 17:07:17,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:07:17,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:17,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:07:17,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:07:17,049 INFO L87 Difference]: Start difference. First operand 3305 states and 11670 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:17,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:17,542 INFO L93 Difference]: Finished difference Result 6756 states and 21782 transitions. [2021-06-05 17:07:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:07:17,542 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:17,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:17,552 INFO L225 Difference]: With dead ends: 6756 [2021-06-05 17:07:17,552 INFO L226 Difference]: Without dead ends: 6709 [2021-06-05 17:07:17,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 288.3ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:07:17,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6709 states. [2021-06-05 17:07:17,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6709 to 3468. [2021-06-05 17:07:17,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3468 states, 3467 states have (on average 3.5785982117104123) internal successors, (12407), 3467 states have internal predecessors, (12407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:17,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3468 states to 3468 states and 12407 transitions. [2021-06-05 17:07:17,628 INFO L78 Accepts]: Start accepts. Automaton has 3468 states and 12407 transitions. Word has length 28 [2021-06-05 17:07:17,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:17,628 INFO L482 AbstractCegarLoop]: Abstraction has 3468 states and 12407 transitions. [2021-06-05 17:07:17,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:17,629 INFO L276 IsEmpty]: Start isEmpty. Operand 3468 states and 12407 transitions. [2021-06-05 17:07:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:17,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:17,633 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:17,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 17:07:17,833 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:17,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:17,834 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 68 times [2021-06-05 17:07:17,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:17,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510867795] [2021-06-05 17:07:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:17,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:17,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510867795] [2021-06-05 17:07:17,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510867795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:17,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383143240] [2021-06-05 17:07:17,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:17,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:07:17,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:17,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:07:17,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:17,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383143240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:17,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:17,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 17:07:17,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869449136] [2021-06-05 17:07:17,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:07:17,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:17,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:07:17,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:07:17,934 INFO L87 Difference]: Start difference. First operand 3468 states and 12407 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:18,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:18,078 INFO L93 Difference]: Finished difference Result 5162 states and 17045 transitions. [2021-06-05 17:07:18,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:07:18,079 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:18,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:18,086 INFO L225 Difference]: With dead ends: 5162 [2021-06-05 17:07:18,086 INFO L226 Difference]: Without dead ends: 5162 [2021-06-05 17:07:18,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:07:18,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2021-06-05 17:07:18,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 3300. [2021-06-05 17:07:18,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3300 states, 3299 states have (on average 3.5383449530160656) internal successors, (11673), 3299 states have internal predecessors, (11673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:18,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3300 states to 3300 states and 11673 transitions. [2021-06-05 17:07:18,142 INFO L78 Accepts]: Start accepts. Automaton has 3300 states and 11673 transitions. Word has length 28 [2021-06-05 17:07:18,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:18,142 INFO L482 AbstractCegarLoop]: Abstraction has 3300 states and 11673 transitions. [2021-06-05 17:07:18,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:18,142 INFO L276 IsEmpty]: Start isEmpty. Operand 3300 states and 11673 transitions. [2021-06-05 17:07:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:18,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:18,146 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:18,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-06-05 17:07:18,347 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:18,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:18,347 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 69 times [2021-06-05 17:07:18,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:18,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507383328] [2021-06-05 17:07:18,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:18,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:18,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507383328] [2021-06-05 17:07:18,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507383328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:18,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15421491] [2021-06-05 17:07:18,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:18,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:07:18,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:18,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:18,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:18,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15421491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:18,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:18,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:07:18,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966058779] [2021-06-05 17:07:18,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:07:18,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:18,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:07:18,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:07:18,496 INFO L87 Difference]: Start difference. First operand 3300 states and 11673 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:19,104 INFO L93 Difference]: Finished difference Result 7204 states and 22976 transitions. [2021-06-05 17:07:19,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 17:07:19,104 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:19,115 INFO L225 Difference]: With dead ends: 7204 [2021-06-05 17:07:19,115 INFO L226 Difference]: Without dead ends: 7204 [2021-06-05 17:07:19,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 356.3ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:07:19,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7204 states. [2021-06-05 17:07:19,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7204 to 3330. [2021-06-05 17:07:19,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3330 states, 3329 states have (on average 3.5379993992189847) internal successors, (11778), 3329 states have internal predecessors, (11778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:19,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 11778 transitions. [2021-06-05 17:07:19,194 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 11778 transitions. Word has length 28 [2021-06-05 17:07:19,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:19,194 INFO L482 AbstractCegarLoop]: Abstraction has 3330 states and 11778 transitions. [2021-06-05 17:07:19,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:19,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 11778 transitions. [2021-06-05 17:07:19,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:19,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:19,199 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:19,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 17:07:19,399 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:19,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:19,400 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 70 times [2021-06-05 17:07:19,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:19,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862207968] [2021-06-05 17:07:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:19,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:19,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862207968] [2021-06-05 17:07:19,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862207968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:19,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718695828] [2021-06-05 17:07:19,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:19,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:07:19,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:19,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:19,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:19,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718695828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:19,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:19,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:07:19,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101530146] [2021-06-05 17:07:19,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:07:19,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:19,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:07:19,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:07:19,526 INFO L87 Difference]: Start difference. First operand 3330 states and 11778 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:20,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:20,259 INFO L93 Difference]: Finished difference Result 7509 states and 23981 transitions. [2021-06-05 17:07:20,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 17:07:20,259 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:20,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:20,271 INFO L225 Difference]: With dead ends: 7509 [2021-06-05 17:07:20,271 INFO L226 Difference]: Without dead ends: 7509 [2021-06-05 17:07:20,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 417.3ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 17:07:20,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7509 states. [2021-06-05 17:07:20,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7509 to 3460. [2021-06-05 17:07:20,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3460 states, 3459 states have (on average 3.5226944203527033) internal successors, (12185), 3459 states have internal predecessors, (12185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:20,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3460 states to 3460 states and 12185 transitions. [2021-06-05 17:07:20,359 INFO L78 Accepts]: Start accepts. Automaton has 3460 states and 12185 transitions. Word has length 28 [2021-06-05 17:07:20,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:20,359 INFO L482 AbstractCegarLoop]: Abstraction has 3460 states and 12185 transitions. [2021-06-05 17:07:20,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:20,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3460 states and 12185 transitions. [2021-06-05 17:07:20,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:20,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:20,364 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:20,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 17:07:20,565 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:20,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:20,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 71 times [2021-06-05 17:07:20,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:20,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132354425] [2021-06-05 17:07:20,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:20,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:20,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132354425] [2021-06-05 17:07:20,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132354425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:20,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309786659] [2021-06-05 17:07:20,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:20,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:07:20,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:20,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:07:20,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:20,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309786659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:20,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:20,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:07:20,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631007859] [2021-06-05 17:07:20,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:07:20,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:20,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:07:20,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:07:20,688 INFO L87 Difference]: Start difference. First operand 3460 states and 12185 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:21,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:21,238 INFO L93 Difference]: Finished difference Result 8003 states and 25580 transitions. [2021-06-05 17:07:21,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:07:21,239 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:21,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:21,251 INFO L225 Difference]: With dead ends: 8003 [2021-06-05 17:07:21,251 INFO L226 Difference]: Without dead ends: 7990 [2021-06-05 17:07:21,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:07:21,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-06-05 17:07:21,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 4105. [2021-06-05 17:07:21,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4105 states, 4104 states have (on average 3.5689571150097468) internal successors, (14647), 4104 states have internal predecessors, (14647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 14647 transitions. [2021-06-05 17:07:21,352 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 14647 transitions. Word has length 28 [2021-06-05 17:07:21,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:21,352 INFO L482 AbstractCegarLoop]: Abstraction has 4105 states and 14647 transitions. [2021-06-05 17:07:21,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 14647 transitions. [2021-06-05 17:07:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:21,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:21,357 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:21,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-05 17:07:21,558 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:21,558 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 72 times [2021-06-05 17:07:21,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:21,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451162225] [2021-06-05 17:07:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:21,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:21,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451162225] [2021-06-05 17:07:21,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451162225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:21,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470181381] [2021-06-05 17:07:21,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:21,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:07:21,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:21,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:07:21,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:21,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470181381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:21,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:21,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:07:21,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289711768] [2021-06-05 17:07:21,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:07:21,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:21,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:07:21,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:07:21,676 INFO L87 Difference]: Start difference. First operand 4105 states and 14647 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:22,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:22,216 INFO L93 Difference]: Finished difference Result 8255 states and 26274 transitions. [2021-06-05 17:07:22,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 17:07:22,217 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:22,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:22,229 INFO L225 Difference]: With dead ends: 8255 [2021-06-05 17:07:22,229 INFO L226 Difference]: Without dead ends: 8255 [2021-06-05 17:07:22,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 325.5ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:07:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8255 states. [2021-06-05 17:07:22,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8255 to 3852. [2021-06-05 17:07:22,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3852 states, 3851 states have (on average 3.5344066476239937) internal successors, (13611), 3851 states have internal predecessors, (13611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3852 states to 3852 states and 13611 transitions. [2021-06-05 17:07:22,336 INFO L78 Accepts]: Start accepts. Automaton has 3852 states and 13611 transitions. Word has length 28 [2021-06-05 17:07:22,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:22,336 INFO L482 AbstractCegarLoop]: Abstraction has 3852 states and 13611 transitions. [2021-06-05 17:07:22,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:22,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3852 states and 13611 transitions. [2021-06-05 17:07:22,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:22,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:22,341 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:22,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:22,549 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:22,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:22,549 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 73 times [2021-06-05 17:07:22,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:22,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769567886] [2021-06-05 17:07:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:22,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:22,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769567886] [2021-06-05 17:07:22,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769567886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:22,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311554118] [2021-06-05 17:07:22,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:22,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:22,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:22,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311554118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:22,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:22,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:07:22,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207163536] [2021-06-05 17:07:22,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:07:22,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:22,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:07:22,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:07:22,665 INFO L87 Difference]: Start difference. First operand 3852 states and 13611 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:23,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:23,307 INFO L93 Difference]: Finished difference Result 7348 states and 24071 transitions. [2021-06-05 17:07:23,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 17:07:23,307 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:23,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:23,319 INFO L225 Difference]: With dead ends: 7348 [2021-06-05 17:07:23,319 INFO L226 Difference]: Without dead ends: 7344 [2021-06-05 17:07:23,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 354.1ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:07:23,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7344 states. [2021-06-05 17:07:23,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7344 to 3485. [2021-06-05 17:07:23,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3485 states, 3484 states have (on average 3.577784156142365) internal successors, (12465), 3484 states have internal predecessors, (12465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:23,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3485 states to 3485 states and 12465 transitions. [2021-06-05 17:07:23,404 INFO L78 Accepts]: Start accepts. Automaton has 3485 states and 12465 transitions. Word has length 28 [2021-06-05 17:07:23,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:23,404 INFO L482 AbstractCegarLoop]: Abstraction has 3485 states and 12465 transitions. [2021-06-05 17:07:23,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:23,404 INFO L276 IsEmpty]: Start isEmpty. Operand 3485 states and 12465 transitions. [2021-06-05 17:07:23,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:23,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:23,409 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:23,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-05 17:07:23,609 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:23,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:23,609 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 74 times [2021-06-05 17:07:23,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:23,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061691148] [2021-06-05 17:07:23,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:23,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:23,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061691148] [2021-06-05 17:07:23,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061691148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:23,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88016273] [2021-06-05 17:07:23,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:23,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:07:23,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:23,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:23,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:23,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88016273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:23,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:23,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:07:23,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391333458] [2021-06-05 17:07:23,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:07:23,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:23,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:07:23,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:07:23,778 INFO L87 Difference]: Start difference. First operand 3485 states and 12465 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:24,716 INFO L93 Difference]: Finished difference Result 11702 states and 38583 transitions. [2021-06-05 17:07:24,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 17:07:24,717 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:24,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:24,737 INFO L225 Difference]: With dead ends: 11702 [2021-06-05 17:07:24,737 INFO L226 Difference]: Without dead ends: 11702 [2021-06-05 17:07:24,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 532.2ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:07:24,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11702 states. [2021-06-05 17:07:24,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11702 to 3776. [2021-06-05 17:07:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3776 states, 3775 states have (on average 3.6603973509933776) internal successors, (13818), 3775 states have internal predecessors, (13818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:24,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3776 states to 3776 states and 13818 transitions. [2021-06-05 17:07:24,872 INFO L78 Accepts]: Start accepts. Automaton has 3776 states and 13818 transitions. Word has length 28 [2021-06-05 17:07:24,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:24,872 INFO L482 AbstractCegarLoop]: Abstraction has 3776 states and 13818 transitions. [2021-06-05 17:07:24,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:24,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3776 states and 13818 transitions. [2021-06-05 17:07:24,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:24,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:24,877 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:25,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-05 17:07:25,078 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:25,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:25,078 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 75 times [2021-06-05 17:07:25,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:25,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760342102] [2021-06-05 17:07:25,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:25,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:25,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760342102] [2021-06-05 17:07:25,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760342102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:25,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451541685] [2021-06-05 17:07:25,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:25,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:07:25,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:25,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:25,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:25,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451541685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:25,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:25,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:07:25,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19936725] [2021-06-05 17:07:25,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:07:25,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:25,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:07:25,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:07:25,219 INFO L87 Difference]: Start difference. First operand 3776 states and 13818 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:26,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:26,167 INFO L93 Difference]: Finished difference Result 11394 states and 37759 transitions. [2021-06-05 17:07:26,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 17:07:26,167 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:26,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:26,185 INFO L225 Difference]: With dead ends: 11394 [2021-06-05 17:07:26,185 INFO L226 Difference]: Without dead ends: 11394 [2021-06-05 17:07:26,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 559.9ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:07:26,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11394 states. [2021-06-05 17:07:26,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11394 to 3727. [2021-06-05 17:07:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3727 states, 3726 states have (on average 3.640096618357488) internal successors, (13563), 3726 states have internal predecessors, (13563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:26,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3727 states to 3727 states and 13563 transitions. [2021-06-05 17:07:26,316 INFO L78 Accepts]: Start accepts. Automaton has 3727 states and 13563 transitions. Word has length 28 [2021-06-05 17:07:26,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:26,316 INFO L482 AbstractCegarLoop]: Abstraction has 3727 states and 13563 transitions. [2021-06-05 17:07:26,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:26,316 INFO L276 IsEmpty]: Start isEmpty. Operand 3727 states and 13563 transitions. [2021-06-05 17:07:26,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:26,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:26,321 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:26,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:26,522 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:26,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:26,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 76 times [2021-06-05 17:07:26,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:26,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931135383] [2021-06-05 17:07:26,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:26,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:26,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:26,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931135383] [2021-06-05 17:07:26,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931135383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:26,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454680003] [2021-06-05 17:07:26,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:26,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:07:26,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:26,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:26,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:26,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454680003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:26,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:26,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 17:07:26,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610520124] [2021-06-05 17:07:26,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:07:26,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:26,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:07:26,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:07:26,648 INFO L87 Difference]: Start difference. First operand 3727 states and 13563 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:27,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:27,456 INFO L93 Difference]: Finished difference Result 10677 states and 34212 transitions. [2021-06-05 17:07:27,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 17:07:27,456 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:27,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:27,474 INFO L225 Difference]: With dead ends: 10677 [2021-06-05 17:07:27,474 INFO L226 Difference]: Without dead ends: 10677 [2021-06-05 17:07:27,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 446.7ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 17:07:27,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10677 states. [2021-06-05 17:07:27,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10677 to 3767. [2021-06-05 17:07:27,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3766 states have (on average 3.6444503451938397) internal successors, (13725), 3766 states have internal predecessors, (13725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:27,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 13725 transitions. [2021-06-05 17:07:27,598 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 13725 transitions. Word has length 28 [2021-06-05 17:07:27,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:27,598 INFO L482 AbstractCegarLoop]: Abstraction has 3767 states and 13725 transitions. [2021-06-05 17:07:27,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:27,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 13725 transitions. [2021-06-05 17:07:27,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:27,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:27,603 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:27,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:27,803 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:27,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:27,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 77 times [2021-06-05 17:07:27,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:27,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877661812] [2021-06-05 17:07:27,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:27,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:27,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877661812] [2021-06-05 17:07:27,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877661812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:27,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105684064] [2021-06-05 17:07:27,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:27,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 17:07:27,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:27,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:27,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:27,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105684064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:27,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:27,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 17:07:27,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974320637] [2021-06-05 17:07:27,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:07:27,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:27,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:07:27,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:07:27,927 INFO L87 Difference]: Start difference. First operand 3767 states and 13725 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:28,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:28,707 INFO L93 Difference]: Finished difference Result 10058 states and 32692 transitions. [2021-06-05 17:07:28,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 17:07:28,708 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:28,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:28,724 INFO L225 Difference]: With dead ends: 10058 [2021-06-05 17:07:28,724 INFO L226 Difference]: Without dead ends: 10050 [2021-06-05 17:07:28,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 439.4ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:07:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10050 states. [2021-06-05 17:07:28,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10050 to 3733. [2021-06-05 17:07:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3732 states have (on average 3.6393354769560555) internal successors, (13582), 3732 states have internal predecessors, (13582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:28,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 13582 transitions. [2021-06-05 17:07:28,845 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 13582 transitions. Word has length 28 [2021-06-05 17:07:28,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:28,845 INFO L482 AbstractCegarLoop]: Abstraction has 3733 states and 13582 transitions. [2021-06-05 17:07:28,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:28,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 13582 transitions. [2021-06-05 17:07:28,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:28,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:28,850 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:29,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:29,050 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:29,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:29,051 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 78 times [2021-06-05 17:07:29,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:29,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248197824] [2021-06-05 17:07:29,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:29,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:29,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248197824] [2021-06-05 17:07:29,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248197824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:29,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966616225] [2021-06-05 17:07:29,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:29,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:07:29,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:29,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:29,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:29,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966616225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:29,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:29,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:07:29,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444827626] [2021-06-05 17:07:29,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:07:29,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:29,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:07:29,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:07:29,191 INFO L87 Difference]: Start difference. First operand 3733 states and 13582 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:30,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:30,051 INFO L93 Difference]: Finished difference Result 9657 states and 31573 transitions. [2021-06-05 17:07:30,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 17:07:30,051 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:30,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:30,067 INFO L225 Difference]: With dead ends: 9657 [2021-06-05 17:07:30,067 INFO L226 Difference]: Without dead ends: 9657 [2021-06-05 17:07:30,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 474.6ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 17:07:30,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9657 states. [2021-06-05 17:07:30,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9657 to 3749. [2021-06-05 17:07:30,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3749 states, 3748 states have (on average 3.6408751334044824) internal successors, (13646), 3748 states have internal predecessors, (13646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:30,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3749 states to 3749 states and 13646 transitions. [2021-06-05 17:07:30,194 INFO L78 Accepts]: Start accepts. Automaton has 3749 states and 13646 transitions. Word has length 28 [2021-06-05 17:07:30,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:30,195 INFO L482 AbstractCegarLoop]: Abstraction has 3749 states and 13646 transitions. [2021-06-05 17:07:30,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:30,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3749 states and 13646 transitions. [2021-06-05 17:07:30,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:30,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:30,200 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:30,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 17:07:30,400 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:30,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:30,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 79 times [2021-06-05 17:07:30,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:30,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2637925] [2021-06-05 17:07:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:30,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:30,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2637925] [2021-06-05 17:07:30,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2637925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:30,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787553254] [2021-06-05 17:07:30,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:30,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:30,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:30,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787553254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:30,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:30,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:07:30,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467750037] [2021-06-05 17:07:30,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:07:30,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:30,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:07:30,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:07:30,529 INFO L87 Difference]: Start difference. First operand 3749 states and 13646 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:31,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:31,351 INFO L93 Difference]: Finished difference Result 9322 states and 30778 transitions. [2021-06-05 17:07:31,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 17:07:31,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:31,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:31,367 INFO L225 Difference]: With dead ends: 9322 [2021-06-05 17:07:31,367 INFO L226 Difference]: Without dead ends: 9314 [2021-06-05 17:07:31,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 460.1ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:07:31,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9314 states. [2021-06-05 17:07:31,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9314 to 3417. [2021-06-05 17:07:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 3.55327868852459) internal successors, (12138), 3416 states have internal predecessors, (12138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 12138 transitions. [2021-06-05 17:07:31,475 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 12138 transitions. Word has length 28 [2021-06-05 17:07:31,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:31,475 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 12138 transitions. [2021-06-05 17:07:31,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:31,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 12138 transitions. [2021-06-05 17:07:31,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:31,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:31,480 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:31,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 17:07:31,681 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:31,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:31,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 80 times [2021-06-05 17:07:31,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:31,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625679788] [2021-06-05 17:07:31,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:31,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:31,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625679788] [2021-06-05 17:07:31,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625679788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:31,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594901863] [2021-06-05 17:07:31,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:31,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:07:31,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:31,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:31,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:31,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594901863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:31,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:31,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:07:31,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945522184] [2021-06-05 17:07:31,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:07:31,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:31,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:07:31,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:07:31,866 INFO L87 Difference]: Start difference. First operand 3417 states and 12138 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:32,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:32,714 INFO L93 Difference]: Finished difference Result 7074 states and 23087 transitions. [2021-06-05 17:07:32,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:07:32,715 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:32,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:32,726 INFO L225 Difference]: With dead ends: 7074 [2021-06-05 17:07:32,726 INFO L226 Difference]: Without dead ends: 7074 [2021-06-05 17:07:32,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 527.9ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:07:32,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7074 states. [2021-06-05 17:07:32,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7074 to 3429. [2021-06-05 17:07:32,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 3.5519253208868147) internal successors, (12176), 3428 states have internal predecessors, (12176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 12176 transitions. [2021-06-05 17:07:32,805 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 12176 transitions. Word has length 28 [2021-06-05 17:07:32,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:32,805 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 12176 transitions. [2021-06-05 17:07:32,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:32,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 12176 transitions. [2021-06-05 17:07:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:32,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:32,809 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:33,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 17:07:33,010 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:33,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:33,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 81 times [2021-06-05 17:07:33,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:33,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927760206] [2021-06-05 17:07:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:33,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:33,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927760206] [2021-06-05 17:07:33,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927760206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:33,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746734111] [2021-06-05 17:07:33,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:33,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:07:33,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:33,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:33,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:33,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746734111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:33,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:33,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:07:33,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923795040] [2021-06-05 17:07:33,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:07:33,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:33,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:07:33,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:07:33,160 INFO L87 Difference]: Start difference. First operand 3429 states and 12176 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:34,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:34,199 INFO L93 Difference]: Finished difference Result 8002 states and 25476 transitions. [2021-06-05 17:07:34,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 17:07:34,199 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:34,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:34,211 INFO L225 Difference]: With dead ends: 8002 [2021-06-05 17:07:34,212 INFO L226 Difference]: Without dead ends: 8002 [2021-06-05 17:07:34,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 638.7ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 17:07:34,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8002 states. [2021-06-05 17:07:34,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8002 to 3495. [2021-06-05 17:07:34,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 3494 states have (on average 3.546937607326846) internal successors, (12393), 3494 states have internal predecessors, (12393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:34,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 12393 transitions. [2021-06-05 17:07:34,302 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 12393 transitions. Word has length 28 [2021-06-05 17:07:34,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:34,303 INFO L482 AbstractCegarLoop]: Abstraction has 3495 states and 12393 transitions. [2021-06-05 17:07:34,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:34,303 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 12393 transitions. [2021-06-05 17:07:34,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:34,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:34,308 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:34,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 17:07:34,521 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:34,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:34,522 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 82 times [2021-06-05 17:07:34,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:34,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739938787] [2021-06-05 17:07:34,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:34,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:34,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739938787] [2021-06-05 17:07:34,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739938787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:34,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142379356] [2021-06-05 17:07:34,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:34,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:07:34,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:34,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:34,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:34,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:34,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142379356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:34,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:34,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:07:34,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378655469] [2021-06-05 17:07:34,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:07:34,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:34,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:07:34,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:07:34,667 INFO L87 Difference]: Start difference. First operand 3495 states and 12393 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:35,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:35,583 INFO L93 Difference]: Finished difference Result 7385 states and 23848 transitions. [2021-06-05 17:07:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 17:07:35,583 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:35,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:35,596 INFO L225 Difference]: With dead ends: 7385 [2021-06-05 17:07:35,596 INFO L226 Difference]: Without dead ends: 7381 [2021-06-05 17:07:35,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 557.9ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 17:07:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7381 states. [2021-06-05 17:07:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7381 to 3430. [2021-06-05 17:07:35,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.5444736074657333) internal successors, (12154), 3429 states have internal predecessors, (12154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:35,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 12154 transitions. [2021-06-05 17:07:35,698 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 12154 transitions. Word has length 28 [2021-06-05 17:07:35,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:35,698 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 12154 transitions. [2021-06-05 17:07:35,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 12154 transitions. [2021-06-05 17:07:35,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:35,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:35,703 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:35,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:35,903 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:35,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:35,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 72 times [2021-06-05 17:07:35,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:35,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459905112] [2021-06-05 17:07:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:35,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:35,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:35,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459905112] [2021-06-05 17:07:35,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459905112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:35,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449975417] [2021-06-05 17:07:35,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:35,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:07:35,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:35,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:35,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:36,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449975417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:36,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:36,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:07:36,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889145470] [2021-06-05 17:07:36,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:07:36,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:36,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:07:36,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:07:36,034 INFO L87 Difference]: Start difference. First operand 3430 states and 12154 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:36,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:36,554 INFO L93 Difference]: Finished difference Result 6528 states and 21436 transitions. [2021-06-05 17:07:36,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:07:36,554 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:36,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:36,565 INFO L225 Difference]: With dead ends: 6528 [2021-06-05 17:07:36,565 INFO L226 Difference]: Without dead ends: 6528 [2021-06-05 17:07:36,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 298.3ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:07:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2021-06-05 17:07:36,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 3434. [2021-06-05 17:07:36,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.5461695310224295) internal successors, (12174), 3433 states have internal predecessors, (12174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:36,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 12174 transitions. [2021-06-05 17:07:36,641 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 12174 transitions. Word has length 28 [2021-06-05 17:07:36,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:36,641 INFO L482 AbstractCegarLoop]: Abstraction has 3434 states and 12174 transitions. [2021-06-05 17:07:36,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:36,641 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 12174 transitions. [2021-06-05 17:07:36,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:36,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:36,646 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:36,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-05 17:07:36,847 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:36,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:36,847 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 73 times [2021-06-05 17:07:36,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:36,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074250558] [2021-06-05 17:07:36,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:36,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:36,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074250558] [2021-06-05 17:07:36,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074250558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:36,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519732062] [2021-06-05 17:07:36,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:36,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:36,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:37,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519732062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:37,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:37,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:07:37,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150504847] [2021-06-05 17:07:37,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:07:37,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:37,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:07:37,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:07:37,004 INFO L87 Difference]: Start difference. First operand 3434 states and 12174 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:37,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:37,793 INFO L93 Difference]: Finished difference Result 6993 states and 22735 transitions. [2021-06-05 17:07:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 17:07:37,793 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:37,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:37,804 INFO L225 Difference]: With dead ends: 6993 [2021-06-05 17:07:37,804 INFO L226 Difference]: Without dead ends: 6993 [2021-06-05 17:07:37,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 440.8ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 17:07:37,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6993 states. [2021-06-05 17:07:37,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6993 to 3448. [2021-06-05 17:07:37,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3448 states, 3447 states have (on average 3.543661154627212) internal successors, (12215), 3447 states have internal predecessors, (12215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:37,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 12215 transitions. [2021-06-05 17:07:37,882 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 12215 transitions. Word has length 28 [2021-06-05 17:07:37,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:37,882 INFO L482 AbstractCegarLoop]: Abstraction has 3448 states and 12215 transitions. [2021-06-05 17:07:37,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:37,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 12215 transitions. [2021-06-05 17:07:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:37,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:37,886 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:38,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:38,087 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:38,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:38,087 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 74 times [2021-06-05 17:07:38,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:38,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963092457] [2021-06-05 17:07:38,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:38,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:38,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963092457] [2021-06-05 17:07:38,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963092457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:38,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915748219] [2021-06-05 17:07:38,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:38,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:07:38,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:38,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:38,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:38,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915748219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:38,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:38,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:07:38,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840948726] [2021-06-05 17:07:38,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:07:38,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:38,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:07:38,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:07:38,235 INFO L87 Difference]: Start difference. First operand 3448 states and 12215 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:38,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:38,993 INFO L93 Difference]: Finished difference Result 7512 states and 24206 transitions. [2021-06-05 17:07:38,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 17:07:38,994 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:38,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:39,006 INFO L225 Difference]: With dead ends: 7512 [2021-06-05 17:07:39,006 INFO L226 Difference]: Without dead ends: 7512 [2021-06-05 17:07:39,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 453.9ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 17:07:39,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7512 states. [2021-06-05 17:07:39,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7512 to 3530. [2021-06-05 17:07:39,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3530 states, 3529 states have (on average 3.537546047038821) internal successors, (12484), 3529 states have internal predecessors, (12484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:39,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3530 states to 3530 states and 12484 transitions. [2021-06-05 17:07:39,095 INFO L78 Accepts]: Start accepts. Automaton has 3530 states and 12484 transitions. Word has length 28 [2021-06-05 17:07:39,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:39,095 INFO L482 AbstractCegarLoop]: Abstraction has 3530 states and 12484 transitions. [2021-06-05 17:07:39,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:39,095 INFO L276 IsEmpty]: Start isEmpty. Operand 3530 states and 12484 transitions. [2021-06-05 17:07:39,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:39,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:39,100 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:39,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-05 17:07:39,301 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:39,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:39,301 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 75 times [2021-06-05 17:07:39,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:39,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167859823] [2021-06-05 17:07:39,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:39,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:39,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167859823] [2021-06-05 17:07:39,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167859823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:39,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913377080] [2021-06-05 17:07:39,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:39,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:07:39,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:39,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:39,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:39,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:39,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913377080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:39,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:39,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 17:07:39,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628164986] [2021-06-05 17:07:39,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:07:39,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:39,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:07:39,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:07:39,443 INFO L87 Difference]: Start difference. First operand 3530 states and 12484 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:39,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:39,966 INFO L93 Difference]: Finished difference Result 7330 states and 25000 transitions. [2021-06-05 17:07:39,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:07:39,967 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:39,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:39,979 INFO L225 Difference]: With dead ends: 7330 [2021-06-05 17:07:39,979 INFO L226 Difference]: Without dead ends: 7330 [2021-06-05 17:07:39,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 369.7ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:07:39,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7330 states. [2021-06-05 17:07:40,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7330 to 4693. [2021-06-05 17:07:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4693 states, 4692 states have (on average 3.6579283887468033) internal successors, (17163), 4692 states have internal predecessors, (17163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 17163 transitions. [2021-06-05 17:07:40,079 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 17163 transitions. Word has length 28 [2021-06-05 17:07:40,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:40,079 INFO L482 AbstractCegarLoop]: Abstraction has 4693 states and 17163 transitions. [2021-06-05 17:07:40,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:40,079 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 17163 transitions. [2021-06-05 17:07:40,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:40,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:40,086 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:40,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:40,287 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:40,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:40,287 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 76 times [2021-06-05 17:07:40,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:40,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914661437] [2021-06-05 17:07:40,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:40,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:40,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914661437] [2021-06-05 17:07:40,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914661437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:40,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305119095] [2021-06-05 17:07:40,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:40,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:07:40,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:40,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:40,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:40,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305119095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:40,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:40,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:07:40,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713124897] [2021-06-05 17:07:40,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:07:40,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:40,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:07:40,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:07:40,411 INFO L87 Difference]: Start difference. First operand 4693 states and 17163 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:41,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:41,149 INFO L93 Difference]: Finished difference Result 8462 states and 28895 transitions. [2021-06-05 17:07:41,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 17:07:41,149 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:41,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:41,164 INFO L225 Difference]: With dead ends: 8462 [2021-06-05 17:07:41,164 INFO L226 Difference]: Without dead ends: 8458 [2021-06-05 17:07:41,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 407.8ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:07:41,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8458 states. [2021-06-05 17:07:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8458 to 4583. [2021-06-05 17:07:41,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 4582 states have (on average 3.6682671322566565) internal successors, (16808), 4582 states have internal predecessors, (16808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 16808 transitions. [2021-06-05 17:07:41,301 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 16808 transitions. Word has length 28 [2021-06-05 17:07:41,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:41,301 INFO L482 AbstractCegarLoop]: Abstraction has 4583 states and 16808 transitions. [2021-06-05 17:07:41,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:41,301 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 16808 transitions. [2021-06-05 17:07:41,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:41,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:41,308 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:41,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable351 [2021-06-05 17:07:41,508 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:41,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:41,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 83 times [2021-06-05 17:07:41,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:41,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551044283] [2021-06-05 17:07:41,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:41,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:41,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551044283] [2021-06-05 17:07:41,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551044283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:41,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836292492] [2021-06-05 17:07:41,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:41,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:07:41,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:41,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:07:41,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:41,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836292492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:41,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:41,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 17:07:41,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088757353] [2021-06-05 17:07:41,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:07:41,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:41,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:07:41,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:07:41,643 INFO L87 Difference]: Start difference. First operand 4583 states and 16808 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:42,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:42,440 INFO L93 Difference]: Finished difference Result 9599 states and 32446 transitions. [2021-06-05 17:07:42,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:07:42,441 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:42,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:42,456 INFO L225 Difference]: With dead ends: 9599 [2021-06-05 17:07:42,457 INFO L226 Difference]: Without dead ends: 9587 [2021-06-05 17:07:42,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 455.4ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:07:42,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9587 states. [2021-06-05 17:07:42,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9587 to 5054. [2021-06-05 17:07:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5054 states, 5053 states have (on average 3.752226400158322) internal successors, (18960), 5053 states have internal predecessors, (18960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:42,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5054 states to 5054 states and 18960 transitions. [2021-06-05 17:07:42,573 INFO L78 Accepts]: Start accepts. Automaton has 5054 states and 18960 transitions. Word has length 28 [2021-06-05 17:07:42,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:42,573 INFO L482 AbstractCegarLoop]: Abstraction has 5054 states and 18960 transitions. [2021-06-05 17:07:42,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:42,574 INFO L276 IsEmpty]: Start isEmpty. Operand 5054 states and 18960 transitions. [2021-06-05 17:07:42,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:42,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:42,581 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:42,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:42,781 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:42,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:42,781 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 84 times [2021-06-05 17:07:42,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:42,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670628339] [2021-06-05 17:07:42,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:42,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:42,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670628339] [2021-06-05 17:07:42,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670628339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:42,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034698265] [2021-06-05 17:07:42,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:42,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:07:42,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:42,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:07:42,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:42,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034698265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:42,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:42,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 17:07:42,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374991611] [2021-06-05 17:07:42,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:07:42,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:42,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:07:42,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:07:42,916 INFO L87 Difference]: Start difference. First operand 5054 states and 18960 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:43,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:43,697 INFO L93 Difference]: Finished difference Result 9931 states and 33478 transitions. [2021-06-05 17:07:43,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:07:43,697 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:43,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:43,716 INFO L225 Difference]: With dead ends: 9931 [2021-06-05 17:07:43,716 INFO L226 Difference]: Without dead ends: 9931 [2021-06-05 17:07:43,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 460.6ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:07:43,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9931 states. [2021-06-05 17:07:43,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9931 to 5074. [2021-06-05 17:07:43,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5074 states, 5073 states have (on average 3.737236349300217) internal successors, (18959), 5073 states have internal predecessors, (18959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:43,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5074 states to 5074 states and 18959 transitions. [2021-06-05 17:07:43,838 INFO L78 Accepts]: Start accepts. Automaton has 5074 states and 18959 transitions. Word has length 28 [2021-06-05 17:07:43,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:43,838 INFO L482 AbstractCegarLoop]: Abstraction has 5074 states and 18959 transitions. [2021-06-05 17:07:43,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:43,838 INFO L276 IsEmpty]: Start isEmpty. Operand 5074 states and 18959 transitions. [2021-06-05 17:07:43,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:43,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:43,846 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:44,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-05 17:07:44,046 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:44,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:44,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 85 times [2021-06-05 17:07:44,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:44,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535288512] [2021-06-05 17:07:44,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:44,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:44,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535288512] [2021-06-05 17:07:44,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535288512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:44,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275390661] [2021-06-05 17:07:44,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:44,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:07:44,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:44,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275390661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:44,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:44,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:07:44,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223723831] [2021-06-05 17:07:44,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:07:44,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:44,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:07:44,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:07:44,152 INFO L87 Difference]: Start difference. First operand 5074 states and 18959 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:44,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:44,521 INFO L93 Difference]: Finished difference Result 9404 states and 33475 transitions. [2021-06-05 17:07:44,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:07:44,521 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:44,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:44,538 INFO L225 Difference]: With dead ends: 9404 [2021-06-05 17:07:44,539 INFO L226 Difference]: Without dead ends: 9321 [2021-06-05 17:07:44,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 204.5ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 17:07:44,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9321 states. [2021-06-05 17:07:44,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9321 to 6509. [2021-06-05 17:07:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6509 states, 6508 states have (on average 3.785341118623233) internal successors, (24635), 6508 states have internal predecessors, (24635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:44,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 24635 transitions. [2021-06-05 17:07:44,667 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 24635 transitions. Word has length 28 [2021-06-05 17:07:44,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:44,667 INFO L482 AbstractCegarLoop]: Abstraction has 6509 states and 24635 transitions. [2021-06-05 17:07:44,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:44,667 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 24635 transitions. [2021-06-05 17:07:44,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:44,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:44,677 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:44,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable354,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:44,877 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:44,878 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 86 times [2021-06-05 17:07:44,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:44,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921527504] [2021-06-05 17:07:44,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:44,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:44,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921527504] [2021-06-05 17:07:44,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921527504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:44,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605527116] [2021-06-05 17:07:44,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:44,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:07:44,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:44,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:07:44,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:44,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605527116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:44,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:44,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 17:07:44,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461142932] [2021-06-05 17:07:44,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:07:44,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:44,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:07:44,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:07:44,976 INFO L87 Difference]: Start difference. First operand 6509 states and 24635 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:45,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:45,146 INFO L93 Difference]: Finished difference Result 8941 states and 31711 transitions. [2021-06-05 17:07:45,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:07:45,146 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:45,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:45,162 INFO L225 Difference]: With dead ends: 8941 [2021-06-05 17:07:45,162 INFO L226 Difference]: Without dead ends: 8941 [2021-06-05 17:07:45,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:07:45,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8941 states. [2021-06-05 17:07:45,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8941 to 6655. [2021-06-05 17:07:45,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6655 states, 6654 states have (on average 3.7639014126841) internal successors, (25045), 6654 states have internal predecessors, (25045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:45,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6655 states to 6655 states and 25045 transitions. [2021-06-05 17:07:45,325 INFO L78 Accepts]: Start accepts. Automaton has 6655 states and 25045 transitions. Word has length 28 [2021-06-05 17:07:45,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:45,325 INFO L482 AbstractCegarLoop]: Abstraction has 6655 states and 25045 transitions. [2021-06-05 17:07:45,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:45,325 INFO L276 IsEmpty]: Start isEmpty. Operand 6655 states and 25045 transitions. [2021-06-05 17:07:45,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:45,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:45,335 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:45,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-05 17:07:45,535 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:45,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:45,535 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 87 times [2021-06-05 17:07:45,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:45,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103484487] [2021-06-05 17:07:45,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:45,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:45,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103484487] [2021-06-05 17:07:45,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103484487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:45,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081352507] [2021-06-05 17:07:45,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:45,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:07:45,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:45,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:45,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:45,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081352507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:45,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:45,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 17:07:45,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542687440] [2021-06-05 17:07:45,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:07:45,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:45,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:07:45,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:07:45,658 INFO L87 Difference]: Start difference. First operand 6655 states and 25045 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:46,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:46,312 INFO L93 Difference]: Finished difference Result 13667 states and 47756 transitions. [2021-06-05 17:07:46,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 17:07:46,312 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:46,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:46,338 INFO L225 Difference]: With dead ends: 13667 [2021-06-05 17:07:46,339 INFO L226 Difference]: Without dead ends: 13667 [2021-06-05 17:07:46,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 386.3ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:07:46,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13667 states. [2021-06-05 17:07:46,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13667 to 7331. [2021-06-05 17:07:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7331 states, 7330 states have (on average 3.781718963165075) internal successors, (27720), 7330 states have internal predecessors, (27720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7331 states to 7331 states and 27720 transitions. [2021-06-05 17:07:46,532 INFO L78 Accepts]: Start accepts. Automaton has 7331 states and 27720 transitions. Word has length 28 [2021-06-05 17:07:46,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:46,532 INFO L482 AbstractCegarLoop]: Abstraction has 7331 states and 27720 transitions. [2021-06-05 17:07:46,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:46,532 INFO L276 IsEmpty]: Start isEmpty. Operand 7331 states and 27720 transitions. [2021-06-05 17:07:46,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:46,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:46,543 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:46,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-06-05 17:07:46,744 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:46,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:46,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 88 times [2021-06-05 17:07:46,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:46,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797649221] [2021-06-05 17:07:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:46,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:46,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797649221] [2021-06-05 17:07:46,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797649221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:46,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419682623] [2021-06-05 17:07:46,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:46,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:07:46,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:46,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:46,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:46,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419682623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:46,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:46,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 17:07:46,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048175741] [2021-06-05 17:07:46,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:07:46,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:46,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:07:46,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:07:46,868 INFO L87 Difference]: Start difference. First operand 7331 states and 27720 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:47,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:47,493 INFO L93 Difference]: Finished difference Result 13813 states and 48320 transitions. [2021-06-05 17:07:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 17:07:47,493 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:47,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:47,525 INFO L225 Difference]: With dead ends: 13813 [2021-06-05 17:07:47,526 INFO L226 Difference]: Without dead ends: 13813 [2021-06-05 17:07:47,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 355.9ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:07:47,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13813 states. [2021-06-05 17:07:47,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13813 to 7615. [2021-06-05 17:07:47,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7615 states, 7614 states have (on average 3.7583399001838718) internal successors, (28616), 7614 states have internal predecessors, (28616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:47,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7615 states to 7615 states and 28616 transitions. [2021-06-05 17:07:47,713 INFO L78 Accepts]: Start accepts. Automaton has 7615 states and 28616 transitions. Word has length 28 [2021-06-05 17:07:47,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:47,713 INFO L482 AbstractCegarLoop]: Abstraction has 7615 states and 28616 transitions. [2021-06-05 17:07:47,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:47,713 INFO L276 IsEmpty]: Start isEmpty. Operand 7615 states and 28616 transitions. [2021-06-05 17:07:47,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:47,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:47,724 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:47,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-05 17:07:47,925 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:47,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:47,925 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 89 times [2021-06-05 17:07:47,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:47,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971296066] [2021-06-05 17:07:47,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:47,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:47,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971296066] [2021-06-05 17:07:47,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971296066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:47,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777180366] [2021-06-05 17:07:47,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:47,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:07:47,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:47,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:07:47,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:48,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777180366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:48,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:48,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:07:48,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042507724] [2021-06-05 17:07:48,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:07:48,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:48,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:07:48,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:07:48,028 INFO L87 Difference]: Start difference. First operand 7615 states and 28616 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:48,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:48,348 INFO L93 Difference]: Finished difference Result 10157 states and 36733 transitions. [2021-06-05 17:07:48,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:07:48,349 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:48,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:48,367 INFO L225 Difference]: With dead ends: 10157 [2021-06-05 17:07:48,367 INFO L226 Difference]: Without dead ends: 10127 [2021-06-05 17:07:48,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:07:48,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10127 states. [2021-06-05 17:07:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10127 to 8471. [2021-06-05 17:07:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8471 states, 8470 states have (on average 3.7805194805194806) internal successors, (32021), 8470 states have internal predecessors, (32021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:48,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8471 states to 8471 states and 32021 transitions. [2021-06-05 17:07:48,530 INFO L78 Accepts]: Start accepts. Automaton has 8471 states and 32021 transitions. Word has length 28 [2021-06-05 17:07:48,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:48,530 INFO L482 AbstractCegarLoop]: Abstraction has 8471 states and 32021 transitions. [2021-06-05 17:07:48,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:48,530 INFO L276 IsEmpty]: Start isEmpty. Operand 8471 states and 32021 transitions. [2021-06-05 17:07:48,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:48,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:48,542 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:48,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:48,743 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:48,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:48,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 90 times [2021-06-05 17:07:48,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:48,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136587270] [2021-06-05 17:07:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:48,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:48,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136587270] [2021-06-05 17:07:48,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136587270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:48,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146729665] [2021-06-05 17:07:48,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:48,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:07:48,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:48,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:07:48,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:48,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146729665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:48,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:48,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:07:48,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041612311] [2021-06-05 17:07:48,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:07:48,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:48,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:07:48,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:07:48,845 INFO L87 Difference]: Start difference. First operand 8471 states and 32021 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:49,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:49,185 INFO L93 Difference]: Finished difference Result 10767 states and 38758 transitions. [2021-06-05 17:07:49,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:07:49,186 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:49,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:49,205 INFO L225 Difference]: With dead ends: 10767 [2021-06-05 17:07:49,205 INFO L226 Difference]: Without dead ends: 10767 [2021-06-05 17:07:49,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:07:49,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10767 states. [2021-06-05 17:07:49,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10767 to 8511. [2021-06-05 17:07:49,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8511 states, 8510 states have (on average 3.7767332549941246) internal successors, (32140), 8510 states have internal predecessors, (32140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:49,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8511 states to 8511 states and 32140 transitions. [2021-06-05 17:07:49,398 INFO L78 Accepts]: Start accepts. Automaton has 8511 states and 32140 transitions. Word has length 28 [2021-06-05 17:07:49,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:49,398 INFO L482 AbstractCegarLoop]: Abstraction has 8511 states and 32140 transitions. [2021-06-05 17:07:49,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:49,399 INFO L276 IsEmpty]: Start isEmpty. Operand 8511 states and 32140 transitions. [2021-06-05 17:07:49,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:49,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:49,411 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:49,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-05 17:07:49,612 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:49,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:49,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 91 times [2021-06-05 17:07:49,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:49,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842559981] [2021-06-05 17:07:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:49,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:49,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842559981] [2021-06-05 17:07:49,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842559981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:49,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448867133] [2021-06-05 17:07:49,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:49,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:49,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:49,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448867133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:49,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:49,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 17:07:49,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828528821] [2021-06-05 17:07:49,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:07:49,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:49,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:07:49,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:07:49,720 INFO L87 Difference]: Start difference. First operand 8511 states and 32140 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:50,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:50,297 INFO L93 Difference]: Finished difference Result 14516 states and 51666 transitions. [2021-06-05 17:07:50,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:07:50,298 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:50,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:50,327 INFO L225 Difference]: With dead ends: 14516 [2021-06-05 17:07:50,327 INFO L226 Difference]: Without dead ends: 14512 [2021-06-05 17:07:50,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 288.1ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:07:50,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14512 states. [2021-06-05 17:07:50,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14512 to 8415. [2021-06-05 17:07:50,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8415 states, 8414 states have (on average 3.7803660565723796) internal successors, (31808), 8414 states have internal predecessors, (31808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:50,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8415 states to 8415 states and 31808 transitions. [2021-06-05 17:07:50,539 INFO L78 Accepts]: Start accepts. Automaton has 8415 states and 31808 transitions. Word has length 28 [2021-06-05 17:07:50,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:50,539 INFO L482 AbstractCegarLoop]: Abstraction has 8415 states and 31808 transitions. [2021-06-05 17:07:50,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:50,539 INFO L276 IsEmpty]: Start isEmpty. Operand 8415 states and 31808 transitions. [2021-06-05 17:07:50,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:50,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:50,552 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:50,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:50,761 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:50,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:50,761 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 92 times [2021-06-05 17:07:50,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:50,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672155587] [2021-06-05 17:07:50,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:50,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:50,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672155587] [2021-06-05 17:07:50,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672155587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:50,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042438367] [2021-06-05 17:07:50,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:50,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:07:50,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:50,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:07:50,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:50,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042438367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:50,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:50,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:07:50,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898998335] [2021-06-05 17:07:50,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:07:50,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:50,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:07:50,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:07:50,880 INFO L87 Difference]: Start difference. First operand 8415 states and 31808 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:51,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:51,314 INFO L93 Difference]: Finished difference Result 10984 states and 39553 transitions. [2021-06-05 17:07:51,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:07:51,315 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:51,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:51,334 INFO L225 Difference]: With dead ends: 10984 [2021-06-05 17:07:51,334 INFO L226 Difference]: Without dead ends: 10984 [2021-06-05 17:07:51,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 190.5ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 17:07:51,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10984 states. [2021-06-05 17:07:51,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10984 to 8331. [2021-06-05 17:07:51,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8331 states, 8330 states have (on average 3.7750300120048017) internal successors, (31446), 8330 states have internal predecessors, (31446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:51,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 31446 transitions. [2021-06-05 17:07:51,492 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 31446 transitions. Word has length 28 [2021-06-05 17:07:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:51,492 INFO L482 AbstractCegarLoop]: Abstraction has 8331 states and 31446 transitions. [2021-06-05 17:07:51,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:51,492 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 31446 transitions. [2021-06-05 17:07:51,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:51,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:51,504 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:51,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:51,705 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:51,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:51,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 93 times [2021-06-05 17:07:51,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:51,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077985906] [2021-06-05 17:07:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:51,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:51,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077985906] [2021-06-05 17:07:51,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077985906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:51,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452989797] [2021-06-05 17:07:51,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:51,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:07:51,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:51,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:51,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:51,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452989797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:51,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:51,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 17:07:51,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511520685] [2021-06-05 17:07:51,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:07:51,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:51,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:07:51,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:07:51,824 INFO L87 Difference]: Start difference. First operand 8331 states and 31446 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:52,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:52,450 INFO L93 Difference]: Finished difference Result 14367 states and 51050 transitions. [2021-06-05 17:07:52,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 17:07:52,451 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:52,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:52,478 INFO L225 Difference]: With dead ends: 14367 [2021-06-05 17:07:52,478 INFO L226 Difference]: Without dead ends: 14355 [2021-06-05 17:07:52,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 343.2ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:07:52,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14355 states. [2021-06-05 17:07:52,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14355 to 8331. [2021-06-05 17:07:52,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8331 states, 8330 states have (on average 3.7740696278511403) internal successors, (31438), 8330 states have internal predecessors, (31438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:52,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 31438 transitions. [2021-06-05 17:07:52,666 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 31438 transitions. Word has length 28 [2021-06-05 17:07:52,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:52,666 INFO L482 AbstractCegarLoop]: Abstraction has 8331 states and 31438 transitions. [2021-06-05 17:07:52,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:52,666 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 31438 transitions. [2021-06-05 17:07:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:52,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:52,678 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:52,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:52,879 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:52,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:52,879 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 94 times [2021-06-05 17:07:52,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:52,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012434683] [2021-06-05 17:07:52,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:52,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:52,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012434683] [2021-06-05 17:07:52,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012434683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:52,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483405801] [2021-06-05 17:07:52,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:52,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:07:52,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:52,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:52,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:53,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483405801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:53,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:53,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:07:53,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115770626] [2021-06-05 17:07:53,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:07:53,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:53,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:07:53,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:07:53,006 INFO L87 Difference]: Start difference. First operand 8331 states and 31438 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:54,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:54,190 INFO L93 Difference]: Finished difference Result 22154 states and 77423 transitions. [2021-06-05 17:07:54,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 17:07:54,190 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:54,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:54,236 INFO L225 Difference]: With dead ends: 22154 [2021-06-05 17:07:54,236 INFO L226 Difference]: Without dead ends: 22154 [2021-06-05 17:07:54,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 701.8ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 17:07:54,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22154 states. [2021-06-05 17:07:54,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22154 to 11512. [2021-06-05 17:07:54,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11512 states, 11511 states have (on average 3.8206063765094256) internal successors, (43979), 11511 states have internal predecessors, (43979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:54,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11512 states to 11512 states and 43979 transitions. [2021-06-05 17:07:54,613 INFO L78 Accepts]: Start accepts. Automaton has 11512 states and 43979 transitions. Word has length 28 [2021-06-05 17:07:54,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:54,613 INFO L482 AbstractCegarLoop]: Abstraction has 11512 states and 43979 transitions. [2021-06-05 17:07:54,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:54,613 INFO L276 IsEmpty]: Start isEmpty. Operand 11512 states and 43979 transitions. [2021-06-05 17:07:54,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:54,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:54,630 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:54,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2021-06-05 17:07:54,831 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:54,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:54,831 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 95 times [2021-06-05 17:07:54,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:54,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471876240] [2021-06-05 17:07:54,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:54,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:54,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471876240] [2021-06-05 17:07:54,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471876240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:54,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754459400] [2021-06-05 17:07:54,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:54,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 17:07:54,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:54,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:54,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:54,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754459400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:54,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:54,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:07:54,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609440752] [2021-06-05 17:07:54,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:07:54,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:54,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:07:54,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:07:54,952 INFO L87 Difference]: Start difference. First operand 11512 states and 43979 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:55,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:55,976 INFO L93 Difference]: Finished difference Result 21281 states and 75167 transitions. [2021-06-05 17:07:55,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 17:07:55,977 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:55,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:56,020 INFO L225 Difference]: With dead ends: 21281 [2021-06-05 17:07:56,020 INFO L226 Difference]: Without dead ends: 21269 [2021-06-05 17:07:56,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 563.7ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 17:07:56,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21269 states. [2021-06-05 17:07:56,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21269 to 11342. [2021-06-05 17:07:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11342 states, 11341 states have (on average 3.8255885724362932) internal successors, (43386), 11341 states have internal predecessors, (43386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:56,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11342 states to 11342 states and 43386 transitions. [2021-06-05 17:07:56,390 INFO L78 Accepts]: Start accepts. Automaton has 11342 states and 43386 transitions. Word has length 28 [2021-06-05 17:07:56,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:56,390 INFO L482 AbstractCegarLoop]: Abstraction has 11342 states and 43386 transitions. [2021-06-05 17:07:56,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:56,390 INFO L276 IsEmpty]: Start isEmpty. Operand 11342 states and 43386 transitions. [2021-06-05 17:07:56,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:56,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:56,409 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:56,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:56,609 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:56,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:56,609 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 96 times [2021-06-05 17:07:56,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:56,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418933275] [2021-06-05 17:07:56,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:56,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:56,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:56,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418933275] [2021-06-05 17:07:56,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418933275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:56,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767174663] [2021-06-05 17:07:56,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:56,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:07:56,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:56,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:56,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:56,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767174663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:56,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:56,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:07:56,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220387108] [2021-06-05 17:07:56,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:07:56,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:56,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:07:56,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:07:56,735 INFO L87 Difference]: Start difference. First operand 11342 states and 43386 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:57,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:57,692 INFO L93 Difference]: Finished difference Result 21160 states and 74599 transitions. [2021-06-05 17:07:57,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 17:07:57,692 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:57,799 INFO L225 Difference]: With dead ends: 21160 [2021-06-05 17:07:57,799 INFO L226 Difference]: Without dead ends: 21124 [2021-06-05 17:07:57,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 525.1ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 17:07:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21124 states. [2021-06-05 17:07:58,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21124 to 11386. [2021-06-05 17:07:58,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11386 states, 11385 states have (on average 3.824681598594642) internal successors, (43544), 11385 states have internal predecessors, (43544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:58,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11386 states to 11386 states and 43544 transitions. [2021-06-05 17:07:58,156 INFO L78 Accepts]: Start accepts. Automaton has 11386 states and 43544 transitions. Word has length 28 [2021-06-05 17:07:58,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:58,157 INFO L482 AbstractCegarLoop]: Abstraction has 11386 states and 43544 transitions. [2021-06-05 17:07:58,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:58,157 INFO L276 IsEmpty]: Start isEmpty. Operand 11386 states and 43544 transitions. [2021-06-05 17:07:58,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:58,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:58,174 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:58,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-05 17:07:58,374 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:58,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:58,374 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 97 times [2021-06-05 17:07:58,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:58,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245823735] [2021-06-05 17:07:58,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:58,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:58,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:58,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245823735] [2021-06-05 17:07:58,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245823735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:58,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047448727] [2021-06-05 17:07:58,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:58,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:58,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:58,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:58,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047448727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:58,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:58,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:07:58,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067056456] [2021-06-05 17:07:58,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:07:58,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:58,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:07:58,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:07:58,518 INFO L87 Difference]: Start difference. First operand 11386 states and 43544 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:59,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:59,811 INFO L93 Difference]: Finished difference Result 20907 states and 73951 transitions. [2021-06-05 17:07:59,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 17:07:59,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:07:59,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:59,855 INFO L225 Difference]: With dead ends: 20907 [2021-06-05 17:07:59,855 INFO L226 Difference]: Without dead ends: 20907 [2021-06-05 17:07:59,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 802.0ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 17:07:59,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20907 states. [2021-06-05 17:08:00,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20907 to 11582. [2021-06-05 17:08:00,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11582 states, 11581 states have (on average 3.8160780588895604) internal successors, (44194), 11581 states have internal predecessors, (44194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11582 states to 11582 states and 44194 transitions. [2021-06-05 17:08:00,230 INFO L78 Accepts]: Start accepts. Automaton has 11582 states and 44194 transitions. Word has length 28 [2021-06-05 17:08:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:00,230 INFO L482 AbstractCegarLoop]: Abstraction has 11582 states and 44194 transitions. [2021-06-05 17:08:00,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 11582 states and 44194 transitions. [2021-06-05 17:08:00,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:00,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:00,248 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:00,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 17:08:00,454 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:00,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:00,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 98 times [2021-06-05 17:08:00,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:00,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921140506] [2021-06-05 17:08:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:00,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:00,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921140506] [2021-06-05 17:08:00,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921140506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:00,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015639148] [2021-06-05 17:08:00,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:00,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:08:00,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:00,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:00,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:00,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015639148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:00,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:00,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:08:00,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232837226] [2021-06-05 17:08:00,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:00,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:00,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:00,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:00,598 INFO L87 Difference]: Start difference. First operand 11582 states and 44194 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:01,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:01,727 INFO L93 Difference]: Finished difference Result 20368 states and 72482 transitions. [2021-06-05 17:08:01,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 17:08:01,728 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:01,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:01,769 INFO L225 Difference]: With dead ends: 20368 [2021-06-05 17:08:01,770 INFO L226 Difference]: Without dead ends: 20356 [2021-06-05 17:08:01,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 684.4ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 17:08:01,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20356 states. [2021-06-05 17:08:02,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20356 to 11460. [2021-06-05 17:08:02,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11460 states, 11459 states have (on average 3.8197923029932803) internal successors, (43771), 11459 states have internal predecessors, (43771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:02,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11460 states to 11460 states and 43771 transitions. [2021-06-05 17:08:02,063 INFO L78 Accepts]: Start accepts. Automaton has 11460 states and 43771 transitions. Word has length 28 [2021-06-05 17:08:02,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:02,063 INFO L482 AbstractCegarLoop]: Abstraction has 11460 states and 43771 transitions. [2021-06-05 17:08:02,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:02,063 INFO L276 IsEmpty]: Start isEmpty. Operand 11460 states and 43771 transitions. [2021-06-05 17:08:02,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:02,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:02,079 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:02,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-05 17:08:02,280 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:02,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 99 times [2021-06-05 17:08:02,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:02,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894948164] [2021-06-05 17:08:02,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:02,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:02,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894948164] [2021-06-05 17:08:02,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894948164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:02,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398792852] [2021-06-05 17:08:02,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:02,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 17:08:02,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:02,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:02,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:02,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398792852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:02,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:02,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 17:08:02,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459477326] [2021-06-05 17:08:02,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:08:02,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:02,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:08:02,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:08:02,412 INFO L87 Difference]: Start difference. First operand 11460 states and 43771 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:03,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:03,377 INFO L93 Difference]: Finished difference Result 19606 states and 70387 transitions. [2021-06-05 17:08:03,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 17:08:03,378 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:03,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:03,417 INFO L225 Difference]: With dead ends: 19606 [2021-06-05 17:08:03,417 INFO L226 Difference]: Without dead ends: 19570 [2021-06-05 17:08:03,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 538.8ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 17:08:03,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19570 states. [2021-06-05 17:08:03,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19570 to 11484. [2021-06-05 17:08:03,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11484 states, 11483 states have (on average 3.818775581294087) internal successors, (43851), 11483 states have internal predecessors, (43851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:03,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 43851 transitions. [2021-06-05 17:08:03,701 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 43851 transitions. Word has length 28 [2021-06-05 17:08:03,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:03,701 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 43851 transitions. [2021-06-05 17:08:03,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:03,701 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 43851 transitions. [2021-06-05 17:08:03,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:03,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:03,718 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:03,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-06-05 17:08:03,918 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:03,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:03,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 100 times [2021-06-05 17:08:03,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:03,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880233986] [2021-06-05 17:08:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:03,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:03,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880233986] [2021-06-05 17:08:03,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880233986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:03,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016694885] [2021-06-05 17:08:03,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:03,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:08:03,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:03,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:03,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:04,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016694885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:04,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:04,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:08:04,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982466352] [2021-06-05 17:08:04,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:04,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:04,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:04,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:04,075 INFO L87 Difference]: Start difference. First operand 11484 states and 43851 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:05,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:05,237 INFO L93 Difference]: Finished difference Result 28641 states and 102323 transitions. [2021-06-05 17:08:05,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 17:08:05,237 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:05,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:05,370 INFO L225 Difference]: With dead ends: 28641 [2021-06-05 17:08:05,371 INFO L226 Difference]: Without dead ends: 28641 [2021-06-05 17:08:05,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 687.8ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 17:08:05,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28641 states. [2021-06-05 17:08:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28641 to 11831. [2021-06-05 17:08:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11831 states, 11830 states have (on average 3.8459002535925615) internal successors, (45497), 11830 states have internal predecessors, (45497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:05,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11831 states to 11831 states and 45497 transitions. [2021-06-05 17:08:05,712 INFO L78 Accepts]: Start accepts. Automaton has 11831 states and 45497 transitions. Word has length 28 [2021-06-05 17:08:05,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:05,712 INFO L482 AbstractCegarLoop]: Abstraction has 11831 states and 45497 transitions. [2021-06-05 17:08:05,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:05,712 INFO L276 IsEmpty]: Start isEmpty. Operand 11831 states and 45497 transitions. [2021-06-05 17:08:05,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:05,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:05,730 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:05,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-06-05 17:08:05,931 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:05,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:05,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 101 times [2021-06-05 17:08:05,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:05,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516880933] [2021-06-05 17:08:05,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:05,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:05,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516880933] [2021-06-05 17:08:05,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516880933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:05,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526537797] [2021-06-05 17:08:05,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:05,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:08:05,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:05,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:05,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:06,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526537797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:06,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:06,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:08:06,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076547171] [2021-06-05 17:08:06,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:06,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:06,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:06,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:06,080 INFO L87 Difference]: Start difference. First operand 11831 states and 45497 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:07,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:07,224 INFO L93 Difference]: Finished difference Result 28095 states and 101100 transitions. [2021-06-05 17:08:07,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 17:08:07,224 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:07,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:07,291 INFO L225 Difference]: With dead ends: 28095 [2021-06-05 17:08:07,291 INFO L226 Difference]: Without dead ends: 28095 [2021-06-05 17:08:07,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 684.4ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 17:08:07,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28095 states. [2021-06-05 17:08:07,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28095 to 11720. [2021-06-05 17:08:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11720 states, 11719 states have (on average 3.833176892226299) internal successors, (44921), 11719 states have internal predecessors, (44921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:07,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11720 states to 11720 states and 44921 transitions. [2021-06-05 17:08:07,743 INFO L78 Accepts]: Start accepts. Automaton has 11720 states and 44921 transitions. Word has length 28 [2021-06-05 17:08:07,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:07,743 INFO L482 AbstractCegarLoop]: Abstraction has 11720 states and 44921 transitions. [2021-06-05 17:08:07,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:07,743 INFO L276 IsEmpty]: Start isEmpty. Operand 11720 states and 44921 transitions. [2021-06-05 17:08:07,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:07,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:07,761 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:07,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-06-05 17:08:07,962 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:07,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:07,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 102 times [2021-06-05 17:08:07,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:07,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918561363] [2021-06-05 17:08:07,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:08,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:08,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918561363] [2021-06-05 17:08:08,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918561363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:08,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040592681] [2021-06-05 17:08:08,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:08,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:08:08,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:08,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:08,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:08,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040592681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:08,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:08,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:08:08,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45396160] [2021-06-05 17:08:08,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:08:08,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:08,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:08:08,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:08:08,118 INFO L87 Difference]: Start difference. First operand 11720 states and 44921 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:08,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:08,908 INFO L93 Difference]: Finished difference Result 22250 states and 80381 transitions. [2021-06-05 17:08:08,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 17:08:08,908 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:08,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:08,954 INFO L225 Difference]: With dead ends: 22250 [2021-06-05 17:08:08,954 INFO L226 Difference]: Without dead ends: 22250 [2021-06-05 17:08:08,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 422.1ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:08:08,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22250 states. [2021-06-05 17:08:09,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22250 to 11729. [2021-06-05 17:08:09,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11729 states, 11728 states have (on average 3.8321964529331516) internal successors, (44944), 11728 states have internal predecessors, (44944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:09,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11729 states to 11729 states and 44944 transitions. [2021-06-05 17:08:09,256 INFO L78 Accepts]: Start accepts. Automaton has 11729 states and 44944 transitions. Word has length 28 [2021-06-05 17:08:09,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:09,256 INFO L482 AbstractCegarLoop]: Abstraction has 11729 states and 44944 transitions. [2021-06-05 17:08:09,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:09,256 INFO L276 IsEmpty]: Start isEmpty. Operand 11729 states and 44944 transitions. [2021-06-05 17:08:09,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:09,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:09,274 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:09,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:09,474 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:09,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:09,475 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 103 times [2021-06-05 17:08:09,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:09,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493704243] [2021-06-05 17:08:09,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:09,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:09,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493704243] [2021-06-05 17:08:09,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493704243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:09,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590282019] [2021-06-05 17:08:09,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:09,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:09,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:09,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590282019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:09,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:09,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:08:09,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71212708] [2021-06-05 17:08:09,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:08:09,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:09,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:08:09,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:08:09,610 INFO L87 Difference]: Start difference. First operand 11729 states and 44944 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:10,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:10,392 INFO L93 Difference]: Finished difference Result 20609 states and 75141 transitions. [2021-06-05 17:08:10,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 17:08:10,393 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:10,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:10,437 INFO L225 Difference]: With dead ends: 20609 [2021-06-05 17:08:10,437 INFO L226 Difference]: Without dead ends: 20609 [2021-06-05 17:08:10,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 428.6ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:08:10,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20609 states. [2021-06-05 17:08:10,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20609 to 11741. [2021-06-05 17:08:10,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11741 states, 11740 states have (on average 3.831516183986371) internal successors, (44982), 11740 states have internal predecessors, (44982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11741 states to 11741 states and 44982 transitions. [2021-06-05 17:08:10,790 INFO L78 Accepts]: Start accepts. Automaton has 11741 states and 44982 transitions. Word has length 28 [2021-06-05 17:08:10,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:10,790 INFO L482 AbstractCegarLoop]: Abstraction has 11741 states and 44982 transitions. [2021-06-05 17:08:10,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:10,790 INFO L276 IsEmpty]: Start isEmpty. Operand 11741 states and 44982 transitions. [2021-06-05 17:08:10,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:10,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:10,807 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:11,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:11,008 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:11,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:11,008 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 104 times [2021-06-05 17:08:11,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:11,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148066028] [2021-06-05 17:08:11,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:11,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:11,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148066028] [2021-06-05 17:08:11,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148066028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:11,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140317863] [2021-06-05 17:08:11,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:11,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:08:11,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:11,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:11,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:11,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140317863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:11,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:11,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:08:11,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912308329] [2021-06-05 17:08:11,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:11,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:11,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:11,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:11,152 INFO L87 Difference]: Start difference. First operand 11741 states and 44982 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:12,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:12,157 INFO L93 Difference]: Finished difference Result 21392 states and 77378 transitions. [2021-06-05 17:08:12,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 17:08:12,157 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:12,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:12,203 INFO L225 Difference]: With dead ends: 21392 [2021-06-05 17:08:12,203 INFO L226 Difference]: Without dead ends: 21392 [2021-06-05 17:08:12,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 622.2ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 17:08:12,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21392 states. [2021-06-05 17:08:12,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21392 to 11849. [2021-06-05 17:08:12,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11849 states, 11848 states have (on average 3.824780553679946) internal successors, (45316), 11848 states have internal predecessors, (45316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:12,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11849 states to 11849 states and 45316 transitions. [2021-06-05 17:08:12,543 INFO L78 Accepts]: Start accepts. Automaton has 11849 states and 45316 transitions. Word has length 28 [2021-06-05 17:08:12,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:12,543 INFO L482 AbstractCegarLoop]: Abstraction has 11849 states and 45316 transitions. [2021-06-05 17:08:12,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:12,543 INFO L276 IsEmpty]: Start isEmpty. Operand 11849 states and 45316 transitions. [2021-06-05 17:08:12,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:12,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:12,562 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:12,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:12,762 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:12,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:12,763 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 105 times [2021-06-05 17:08:12,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:12,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676572965] [2021-06-05 17:08:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:12,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:12,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676572965] [2021-06-05 17:08:12,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676572965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:12,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822601029] [2021-06-05 17:08:12,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:12,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 17:08:12,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:12,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:12,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:12,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822601029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:12,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:12,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:08:12,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376509875] [2021-06-05 17:08:12,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:12,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:12,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:12,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:12,914 INFO L87 Difference]: Start difference. First operand 11849 states and 45316 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:13,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:13,787 INFO L93 Difference]: Finished difference Result 20773 states and 75674 transitions. [2021-06-05 17:08:13,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 17:08:13,787 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:13,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:13,829 INFO L225 Difference]: With dead ends: 20773 [2021-06-05 17:08:13,829 INFO L226 Difference]: Without dead ends: 20769 [2021-06-05 17:08:13,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 515.9ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 17:08:13,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20769 states. [2021-06-05 17:08:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20769 to 11775. [2021-06-05 17:08:14,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11775 states, 11774 states have (on average 3.8285204688296246) internal successors, (45077), 11774 states have internal predecessors, (45077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:14,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11775 states to 11775 states and 45077 transitions. [2021-06-05 17:08:14,138 INFO L78 Accepts]: Start accepts. Automaton has 11775 states and 45077 transitions. Word has length 28 [2021-06-05 17:08:14,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:14,138 INFO L482 AbstractCegarLoop]: Abstraction has 11775 states and 45077 transitions. [2021-06-05 17:08:14,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:14,138 INFO L276 IsEmpty]: Start isEmpty. Operand 11775 states and 45077 transitions. [2021-06-05 17:08:14,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:14,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:14,156 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:14,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:14,357 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:14,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:14,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 106 times [2021-06-05 17:08:14,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:14,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36580467] [2021-06-05 17:08:14,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:14,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:14,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36580467] [2021-06-05 17:08:14,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36580467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:14,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500103527] [2021-06-05 17:08:14,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:14,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:08:14,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:14,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:14,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:14,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500103527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:14,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:14,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:08:14,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441006118] [2021-06-05 17:08:14,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:14,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:14,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:14,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:14,501 INFO L87 Difference]: Start difference. First operand 11775 states and 45077 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:15,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:15,474 INFO L93 Difference]: Finished difference Result 20078 states and 72439 transitions. [2021-06-05 17:08:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 17:08:15,475 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:15,515 INFO L225 Difference]: With dead ends: 20078 [2021-06-05 17:08:15,515 INFO L226 Difference]: Without dead ends: 20078 [2021-06-05 17:08:15,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 606.9ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 17:08:15,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20078 states. [2021-06-05 17:08:15,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20078 to 12002. [2021-06-05 17:08:15,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12002 states, 12001 states have (on average 3.8309307557703525) internal successors, (45975), 12001 states have internal predecessors, (45975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12002 states to 12002 states and 45975 transitions. [2021-06-05 17:08:15,828 INFO L78 Accepts]: Start accepts. Automaton has 12002 states and 45975 transitions. Word has length 28 [2021-06-05 17:08:15,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:15,828 INFO L482 AbstractCegarLoop]: Abstraction has 12002 states and 45975 transitions. [2021-06-05 17:08:15,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:15,828 INFO L276 IsEmpty]: Start isEmpty. Operand 12002 states and 45975 transitions. [2021-06-05 17:08:15,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:15,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:15,846 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:16,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 17:08:16,047 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:16,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:16,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 107 times [2021-06-05 17:08:16,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:16,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113155886] [2021-06-05 17:08:16,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:16,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:16,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113155886] [2021-06-05 17:08:16,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113155886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:16,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988105803] [2021-06-05 17:08:16,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:16,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 17:08:16,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:16,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:16,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:16,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988105803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:16,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:16,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:08:16,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291722299] [2021-06-05 17:08:16,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:16,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:16,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:16,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:16,249 INFO L87 Difference]: Start difference. First operand 12002 states and 45975 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:17,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:17,160 INFO L93 Difference]: Finished difference Result 19609 states and 71148 transitions. [2021-06-05 17:08:17,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 17:08:17,161 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:17,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:17,211 INFO L225 Difference]: With dead ends: 19609 [2021-06-05 17:08:17,211 INFO L226 Difference]: Without dead ends: 19597 [2021-06-05 17:08:17,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 506.6ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 17:08:17,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19597 states. [2021-06-05 17:08:17,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19597 to 12104. [2021-06-05 17:08:17,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 12103 states have (on average 3.825332562174667) internal successors, (46298), 12103 states have internal predecessors, (46298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:17,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 46298 transitions. [2021-06-05 17:08:17,543 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 46298 transitions. Word has length 28 [2021-06-05 17:08:17,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:17,543 INFO L482 AbstractCegarLoop]: Abstraction has 12104 states and 46298 transitions. [2021-06-05 17:08:17,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:17,543 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 46298 transitions. [2021-06-05 17:08:17,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:17,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:17,562 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:17,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 17:08:17,762 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:17,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:17,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 77 times [2021-06-05 17:08:17,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:17,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224470077] [2021-06-05 17:08:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:17,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:17,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224470077] [2021-06-05 17:08:17,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224470077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:17,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203319524] [2021-06-05 17:08:17,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:17,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:08:17,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:17,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:17,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:17,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203319524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:17,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:17,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 17:08:17,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605652704] [2021-06-05 17:08:17,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:08:17,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:17,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:08:17,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:08:17,880 INFO L87 Difference]: Start difference. First operand 12104 states and 46298 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:18,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:18,301 INFO L93 Difference]: Finished difference Result 17019 states and 63218 transitions. [2021-06-05 17:08:18,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:08:18,302 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:18,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:18,336 INFO L225 Difference]: With dead ends: 17019 [2021-06-05 17:08:18,337 INFO L226 Difference]: Without dead ends: 17019 [2021-06-05 17:08:18,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:08:18,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17019 states. [2021-06-05 17:08:18,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17019 to 12176. [2021-06-05 17:08:18,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12176 states, 12175 states have (on average 3.820780287474333) internal successors, (46518), 12175 states have internal predecessors, (46518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12176 states to 12176 states and 46518 transitions. [2021-06-05 17:08:18,600 INFO L78 Accepts]: Start accepts. Automaton has 12176 states and 46518 transitions. Word has length 28 [2021-06-05 17:08:18,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:18,600 INFO L482 AbstractCegarLoop]: Abstraction has 12176 states and 46518 transitions. [2021-06-05 17:08:18,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:18,600 INFO L276 IsEmpty]: Start isEmpty. Operand 12176 states and 46518 transitions. [2021-06-05 17:08:18,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:18,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:18,619 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:18,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 17:08:18,819 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:18,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:18,819 INFO L82 PathProgramCache]: Analyzing trace with hash 149924120, now seen corresponding path program 78 times [2021-06-05 17:08:18,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:18,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830009875] [2021-06-05 17:08:18,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:18,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:18,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830009875] [2021-06-05 17:08:18,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830009875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:18,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084265610] [2021-06-05 17:08:18,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:18,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:08:18,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:18,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:18,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:18,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084265610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:18,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:18,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 17:08:18,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360483017] [2021-06-05 17:08:18,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:18,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:18,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:18,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:18,957 INFO L87 Difference]: Start difference. First operand 12176 states and 46518 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:19,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:19,387 INFO L93 Difference]: Finished difference Result 15313 states and 56647 transitions. [2021-06-05 17:08:19,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:08:19,388 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:19,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:19,419 INFO L225 Difference]: With dead ends: 15313 [2021-06-05 17:08:19,420 INFO L226 Difference]: Without dead ends: 15262 [2021-06-05 17:08:19,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 248.8ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 17:08:19,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15262 states. [2021-06-05 17:08:19,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15262 to 11819. [2021-06-05 17:08:19,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11819 states, 11818 states have (on average 3.8123201895413774) internal successors, (45054), 11818 states have internal predecessors, (45054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:19,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11819 states to 11819 states and 45054 transitions. [2021-06-05 17:08:19,655 INFO L78 Accepts]: Start accepts. Automaton has 11819 states and 45054 transitions. Word has length 28 [2021-06-05 17:08:19,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:19,655 INFO L482 AbstractCegarLoop]: Abstraction has 11819 states and 45054 transitions. [2021-06-05 17:08:19,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:19,655 INFO L276 IsEmpty]: Start isEmpty. Operand 11819 states and 45054 transitions. [2021-06-05 17:08:19,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:19,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:19,672 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:19,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 17:08:19,873 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:19,873 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 79 times [2021-06-05 17:08:19,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:19,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621969013] [2021-06-05 17:08:19,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:19,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:19,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621969013] [2021-06-05 17:08:19,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621969013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:19,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196289172] [2021-06-05 17:08:19,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:19,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:19,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:19,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196289172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:19,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:19,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:08:19,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388599044] [2021-06-05 17:08:19,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:08:19,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:19,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:08:19,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:08:19,984 INFO L87 Difference]: Start difference. First operand 11819 states and 45054 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:20,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:20,473 INFO L93 Difference]: Finished difference Result 17677 states and 64654 transitions. [2021-06-05 17:08:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:08:20,473 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:20,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:20,513 INFO L225 Difference]: With dead ends: 17677 [2021-06-05 17:08:20,513 INFO L226 Difference]: Without dead ends: 17677 [2021-06-05 17:08:20,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 266.2ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:08:20,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17677 states. [2021-06-05 17:08:20,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17677 to 12133. [2021-06-05 17:08:20,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12133 states, 12132 states have (on average 3.7958292120013186) internal successors, (46051), 12132 states have internal predecessors, (46051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:20,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12133 states to 12133 states and 46051 transitions. [2021-06-05 17:08:20,800 INFO L78 Accepts]: Start accepts. Automaton has 12133 states and 46051 transitions. Word has length 28 [2021-06-05 17:08:20,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:20,800 INFO L482 AbstractCegarLoop]: Abstraction has 12133 states and 46051 transitions. [2021-06-05 17:08:20,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:20,800 INFO L276 IsEmpty]: Start isEmpty. Operand 12133 states and 46051 transitions. [2021-06-05 17:08:20,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:20,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:20,819 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:21,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:21,020 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:21,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:21,020 INFO L82 PathProgramCache]: Analyzing trace with hash -119803620, now seen corresponding path program 80 times [2021-06-05 17:08:21,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:21,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900042794] [2021-06-05 17:08:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:21,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:21,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900042794] [2021-06-05 17:08:21,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900042794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:21,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428431184] [2021-06-05 17:08:21,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:21,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:08:21,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:21,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:21,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:21,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428431184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:21,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:21,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 17:08:21,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466761172] [2021-06-05 17:08:21,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:21,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:21,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:21,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:21,164 INFO L87 Difference]: Start difference. First operand 12133 states and 46051 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:21,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:21,625 INFO L93 Difference]: Finished difference Result 16906 states and 62799 transitions. [2021-06-05 17:08:21,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:08:21,626 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:21,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:21,660 INFO L225 Difference]: With dead ends: 16906 [2021-06-05 17:08:21,661 INFO L226 Difference]: Without dead ends: 16896 [2021-06-05 17:08:21,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:08:21,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16896 states. [2021-06-05 17:08:21,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16896 to 14164. [2021-06-05 17:08:21,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14164 states, 14163 states have (on average 3.8308268022311656) internal successors, (54256), 14163 states have internal predecessors, (54256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:22,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14164 states to 14164 states and 54256 transitions. [2021-06-05 17:08:22,024 INFO L78 Accepts]: Start accepts. Automaton has 14164 states and 54256 transitions. Word has length 28 [2021-06-05 17:08:22,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:22,024 INFO L482 AbstractCegarLoop]: Abstraction has 14164 states and 54256 transitions. [2021-06-05 17:08:22,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:22,024 INFO L276 IsEmpty]: Start isEmpty. Operand 14164 states and 54256 transitions. [2021-06-05 17:08:22,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:22,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:22,047 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:22,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-05 17:08:22,247 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:22,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:22,248 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 81 times [2021-06-05 17:08:22,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:22,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536267107] [2021-06-05 17:08:22,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:22,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:22,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536267107] [2021-06-05 17:08:22,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536267107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:22,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694705257] [2021-06-05 17:08:22,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:22,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 17:08:22,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:22,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:22,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:22,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694705257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:22,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:22,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:08:22,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417118079] [2021-06-05 17:08:22,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:08:22,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:22,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:08:22,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:08:22,353 INFO L87 Difference]: Start difference. First operand 14164 states and 54256 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:22,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:22,761 INFO L93 Difference]: Finished difference Result 19420 states and 72451 transitions. [2021-06-05 17:08:22,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:08:22,761 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:22,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:22,802 INFO L225 Difference]: With dead ends: 19420 [2021-06-05 17:08:22,802 INFO L226 Difference]: Without dead ends: 19412 [2021-06-05 17:08:22,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:08:22,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19412 states. [2021-06-05 17:08:23,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19412 to 14084. [2021-06-05 17:08:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14084 states, 14083 states have (on average 3.8335581907264076) internal successors, (53988), 14083 states have internal predecessors, (53988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:23,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14084 states to 14084 states and 53988 transitions. [2021-06-05 17:08:23,120 INFO L78 Accepts]: Start accepts. Automaton has 14084 states and 53988 transitions. Word has length 28 [2021-06-05 17:08:23,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:23,120 INFO L482 AbstractCegarLoop]: Abstraction has 14084 states and 53988 transitions. [2021-06-05 17:08:23,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:23,120 INFO L276 IsEmpty]: Start isEmpty. Operand 14084 states and 53988 transitions. [2021-06-05 17:08:23,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:23,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:23,143 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:23,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:23,344 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:23,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:23,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 82 times [2021-06-05 17:08:23,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:23,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695910783] [2021-06-05 17:08:23,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:23,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:23,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695910783] [2021-06-05 17:08:23,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695910783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:23,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419788128] [2021-06-05 17:08:23,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:23,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:08:23,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:23,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:23,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:23,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419788128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:23,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:23,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 17:08:23,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005917446] [2021-06-05 17:08:23,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:08:23,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:23,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:08:23,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:08:23,454 INFO L87 Difference]: Start difference. First operand 14084 states and 53988 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:23,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:23,887 INFO L93 Difference]: Finished difference Result 19300 states and 72099 transitions. [2021-06-05 17:08:23,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:08:23,888 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:23,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:23,932 INFO L225 Difference]: With dead ends: 19300 [2021-06-05 17:08:23,933 INFO L226 Difference]: Without dead ends: 19288 [2021-06-05 17:08:23,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 217.7ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:08:23,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19288 states. [2021-06-05 17:08:24,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19288 to 14050. [2021-06-05 17:08:24,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14050 states, 14049 states have (on average 3.835504306356324) internal successors, (53885), 14049 states have internal predecessors, (53885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14050 states to 14050 states and 53885 transitions. [2021-06-05 17:08:24,267 INFO L78 Accepts]: Start accepts. Automaton has 14050 states and 53885 transitions. Word has length 28 [2021-06-05 17:08:24,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:24,267 INFO L482 AbstractCegarLoop]: Abstraction has 14050 states and 53885 transitions. [2021-06-05 17:08:24,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:24,267 INFO L276 IsEmpty]: Start isEmpty. Operand 14050 states and 53885 transitions. [2021-06-05 17:08:24,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:24,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:24,291 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:24,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:24,505 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:24,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:24,505 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 83 times [2021-06-05 17:08:24,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:24,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190912454] [2021-06-05 17:08:24,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:24,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:24,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190912454] [2021-06-05 17:08:24,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190912454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:24,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920992456] [2021-06-05 17:08:24,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:24,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:08:24,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:24,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:24,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:24,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920992456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:24,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:24,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:08:24,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848271579] [2021-06-05 17:08:24,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:08:24,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:24,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:08:24,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:08:24,644 INFO L87 Difference]: Start difference. First operand 14050 states and 53885 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:25,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:25,562 INFO L93 Difference]: Finished difference Result 26192 states and 94663 transitions. [2021-06-05 17:08:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:08:25,562 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:25,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:25,623 INFO L225 Difference]: With dead ends: 26192 [2021-06-05 17:08:25,624 INFO L226 Difference]: Without dead ends: 26192 [2021-06-05 17:08:25,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 498.4ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:08:25,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26192 states. [2021-06-05 17:08:25,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26192 to 14026. [2021-06-05 17:08:25,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14026 states, 14025 states have (on average 3.834652406417112) internal successors, (53781), 14025 states have internal predecessors, (53781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14026 states to 14026 states and 53781 transitions. [2021-06-05 17:08:25,994 INFO L78 Accepts]: Start accepts. Automaton has 14026 states and 53781 transitions. Word has length 28 [2021-06-05 17:08:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:25,994 INFO L482 AbstractCegarLoop]: Abstraction has 14026 states and 53781 transitions. [2021-06-05 17:08:25,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 14026 states and 53781 transitions. [2021-06-05 17:08:26,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:26,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:26,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:26,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:26,217 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:26,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:26,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 108 times [2021-06-05 17:08:26,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:26,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662946174] [2021-06-05 17:08:26,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:26,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:26,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662946174] [2021-06-05 17:08:26,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662946174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:26,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862756546] [2021-06-05 17:08:26,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:26,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:08:26,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:26,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:08:26,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:26,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862756546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:26,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:26,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 17:08:26,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925282681] [2021-06-05 17:08:26,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:08:26,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:26,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:08:26,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:08:26,350 INFO L87 Difference]: Start difference. First operand 14026 states and 53781 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:27,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:27,007 INFO L93 Difference]: Finished difference Result 21930 states and 80131 transitions. [2021-06-05 17:08:27,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 17:08:27,008 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:27,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:27,061 INFO L225 Difference]: With dead ends: 21930 [2021-06-05 17:08:27,061 INFO L226 Difference]: Without dead ends: 21917 [2021-06-05 17:08:27,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 337.7ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:08:27,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21917 states. [2021-06-05 17:08:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21917 to 15540. [2021-06-05 17:08:27,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15540 states, 15539 states have (on average 3.8934294356136174) internal successors, (60500), 15539 states have internal predecessors, (60500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:27,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15540 states to 15540 states and 60500 transitions. [2021-06-05 17:08:27,462 INFO L78 Accepts]: Start accepts. Automaton has 15540 states and 60500 transitions. Word has length 28 [2021-06-05 17:08:27,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:27,462 INFO L482 AbstractCegarLoop]: Abstraction has 15540 states and 60500 transitions. [2021-06-05 17:08:27,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:27,462 INFO L276 IsEmpty]: Start isEmpty. Operand 15540 states and 60500 transitions. [2021-06-05 17:08:27,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:27,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:27,488 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:27,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:27,688 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:27,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:27,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 109 times [2021-06-05 17:08:27,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:27,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273437027] [2021-06-05 17:08:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:27,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:27,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273437027] [2021-06-05 17:08:27,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273437027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:27,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24203087] [2021-06-05 17:08:27,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:27,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:08:27,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:27,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24203087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:27,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:27,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 17:08:27,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542883622] [2021-06-05 17:08:27,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:08:27,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:27,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:08:27,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:08:27,946 INFO L87 Difference]: Start difference. First operand 15540 states and 60500 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:28,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:28,657 INFO L93 Difference]: Finished difference Result 22091 states and 80578 transitions. [2021-06-05 17:08:28,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 17:08:28,657 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:28,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:28,711 INFO L225 Difference]: With dead ends: 22091 [2021-06-05 17:08:28,711 INFO L226 Difference]: Without dead ends: 22076 [2021-06-05 17:08:28,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:08:28,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22076 states. [2021-06-05 17:08:29,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22076 to 15507. [2021-06-05 17:08:29,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15507 states, 15506 states have (on average 3.892428737262995) internal successors, (60356), 15506 states have internal predecessors, (60356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:29,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15507 states to 15507 states and 60356 transitions. [2021-06-05 17:08:29,136 INFO L78 Accepts]: Start accepts. Automaton has 15507 states and 60356 transitions. Word has length 28 [2021-06-05 17:08:29,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:29,136 INFO L482 AbstractCegarLoop]: Abstraction has 15507 states and 60356 transitions. [2021-06-05 17:08:29,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:29,136 INFO L276 IsEmpty]: Start isEmpty. Operand 15507 states and 60356 transitions. [2021-06-05 17:08:29,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:29,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:29,163 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:29,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:29,364 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:29,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:29,364 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 110 times [2021-06-05 17:08:29,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:29,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8053354] [2021-06-05 17:08:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:29,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:29,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8053354] [2021-06-05 17:08:29,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8053354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:29,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301721667] [2021-06-05 17:08:29,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:29,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:08:29,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:29,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:08:29,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:29,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301721667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:29,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:29,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 17:08:29,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009297769] [2021-06-05 17:08:29,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:08:29,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:29,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:08:29,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:08:29,483 INFO L87 Difference]: Start difference. First operand 15507 states and 60356 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:30,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:30,098 INFO L93 Difference]: Finished difference Result 25101 states and 91625 transitions. [2021-06-05 17:08:30,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:08:30,098 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:30,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:30,160 INFO L225 Difference]: With dead ends: 25101 [2021-06-05 17:08:30,160 INFO L226 Difference]: Without dead ends: 25088 [2021-06-05 17:08:30,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 296.0ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:08:30,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25088 states. [2021-06-05 17:08:30,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25088 to 15601. [2021-06-05 17:08:30,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15601 states, 15600 states have (on average 3.8981410256410256) internal successors, (60811), 15600 states have internal predecessors, (60811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:30,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15601 states to 15601 states and 60811 transitions. [2021-06-05 17:08:30,644 INFO L78 Accepts]: Start accepts. Automaton has 15601 states and 60811 transitions. Word has length 28 [2021-06-05 17:08:30,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:30,645 INFO L482 AbstractCegarLoop]: Abstraction has 15601 states and 60811 transitions. [2021-06-05 17:08:30,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:30,645 INFO L276 IsEmpty]: Start isEmpty. Operand 15601 states and 60811 transitions. [2021-06-05 17:08:30,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:30,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:30,668 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:30,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 17:08:30,869 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:30,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:30,869 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 111 times [2021-06-05 17:08:30,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:30,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632012249] [2021-06-05 17:08:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:30,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:30,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632012249] [2021-06-05 17:08:30,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632012249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:30,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443153030] [2021-06-05 17:08:30,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:30,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:08:30,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:30,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:08:30,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:30,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443153030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:30,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:30,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 17:08:30,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192883532] [2021-06-05 17:08:30,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:08:30,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:31,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:08:31,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:08:31,000 INFO L87 Difference]: Start difference. First operand 15601 states and 60811 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:31,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:31,668 INFO L93 Difference]: Finished difference Result 26885 states and 97285 transitions. [2021-06-05 17:08:31,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 17:08:31,669 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:31,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:31,737 INFO L225 Difference]: With dead ends: 26885 [2021-06-05 17:08:31,737 INFO L226 Difference]: Without dead ends: 26885 [2021-06-05 17:08:31,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 347.3ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:08:31,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26885 states. [2021-06-05 17:08:32,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26885 to 15654. [2021-06-05 17:08:32,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15654 states, 15653 states have (on average 3.894397240145659) internal successors, (60959), 15653 states have internal predecessors, (60959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:32,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15654 states to 15654 states and 60959 transitions. [2021-06-05 17:08:32,199 INFO L78 Accepts]: Start accepts. Automaton has 15654 states and 60959 transitions. Word has length 28 [2021-06-05 17:08:32,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:32,199 INFO L482 AbstractCegarLoop]: Abstraction has 15654 states and 60959 transitions. [2021-06-05 17:08:32,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:32,199 INFO L276 IsEmpty]: Start isEmpty. Operand 15654 states and 60959 transitions. [2021-06-05 17:08:32,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:32,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:32,224 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:32,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 17:08:32,424 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:32,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:32,424 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 84 times [2021-06-05 17:08:32,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:32,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755270270] [2021-06-05 17:08:32,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:32,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:32,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755270270] [2021-06-05 17:08:32,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755270270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:32,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025136100] [2021-06-05 17:08:32,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:32,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 17:08:32,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:32,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:32,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:32,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025136100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:32,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:32,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 17:08:32,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868122371] [2021-06-05 17:08:32,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:08:32,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:32,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:08:32,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:08:32,547 INFO L87 Difference]: Start difference. First operand 15654 states and 60959 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:33,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:33,486 INFO L93 Difference]: Finished difference Result 26297 states and 97911 transitions. [2021-06-05 17:08:33,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 17:08:33,487 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:33,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:33,549 INFO L225 Difference]: With dead ends: 26297 [2021-06-05 17:08:33,549 INFO L226 Difference]: Without dead ends: 26293 [2021-06-05 17:08:33,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 471.2ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 17:08:33,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26293 states. [2021-06-05 17:08:33,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26293 to 15950. [2021-06-05 17:08:33,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15950 states, 15949 states have (on average 3.8838171672205153) internal successors, (61943), 15949 states have internal predecessors, (61943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:34,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15950 states to 15950 states and 61943 transitions. [2021-06-05 17:08:34,033 INFO L78 Accepts]: Start accepts. Automaton has 15950 states and 61943 transitions. Word has length 28 [2021-06-05 17:08:34,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:34,034 INFO L482 AbstractCegarLoop]: Abstraction has 15950 states and 61943 transitions. [2021-06-05 17:08:34,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:34,034 INFO L276 IsEmpty]: Start isEmpty. Operand 15950 states and 61943 transitions. [2021-06-05 17:08:34,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:34,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:34,059 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:34,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 17:08:34,259 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:34,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:34,260 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 112 times [2021-06-05 17:08:34,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:34,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651017825] [2021-06-05 17:08:34,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:34,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:34,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651017825] [2021-06-05 17:08:34,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651017825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:34,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384931861] [2021-06-05 17:08:34,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:34,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:08:34,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:34,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:08:34,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:34,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384931861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:34,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:34,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:08:34,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911935121] [2021-06-05 17:08:34,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:08:34,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:34,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:08:34,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:08:34,375 INFO L87 Difference]: Start difference. First operand 15950 states and 61943 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:34,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:34,979 INFO L93 Difference]: Finished difference Result 23295 states and 86571 transitions. [2021-06-05 17:08:34,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 17:08:34,980 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:34,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:35,033 INFO L225 Difference]: With dead ends: 23295 [2021-06-05 17:08:35,034 INFO L226 Difference]: Without dead ends: 23272 [2021-06-05 17:08:35,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:08:35,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23272 states. [2021-06-05 17:08:35,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23272 to 16091. [2021-06-05 17:08:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16091 states, 16090 states have (on average 3.89608452454941) internal successors, (62688), 16090 states have internal predecessors, (62688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:35,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16091 states to 16091 states and 62688 transitions. [2021-06-05 17:08:35,430 INFO L78 Accepts]: Start accepts. Automaton has 16091 states and 62688 transitions. Word has length 28 [2021-06-05 17:08:35,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:35,430 INFO L482 AbstractCegarLoop]: Abstraction has 16091 states and 62688 transitions. [2021-06-05 17:08:35,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:35,430 INFO L276 IsEmpty]: Start isEmpty. Operand 16091 states and 62688 transitions. [2021-06-05 17:08:35,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:35,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:35,455 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:35,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 17:08:35,655 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:35,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:35,655 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 113 times [2021-06-05 17:08:35,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:35,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216720666] [2021-06-05 17:08:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:35,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:35,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216720666] [2021-06-05 17:08:35,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216720666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:35,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773068079] [2021-06-05 17:08:35,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:35,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:08:35,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:35,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:08:35,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:35,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773068079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:35,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:35,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:08:35,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375484733] [2021-06-05 17:08:35,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:08:35,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:35,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:08:35,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:08:35,774 INFO L87 Difference]: Start difference. First operand 16091 states and 62688 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:36,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:36,445 INFO L93 Difference]: Finished difference Result 22857 states and 83754 transitions. [2021-06-05 17:08:36,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:08:36,445 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:36,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:36,497 INFO L225 Difference]: With dead ends: 22857 [2021-06-05 17:08:36,497 INFO L226 Difference]: Without dead ends: 22857 [2021-06-05 17:08:36,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 375.8ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:08:36,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22857 states. [2021-06-05 17:08:36,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22857 to 16206. [2021-06-05 17:08:36,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16206 states, 16205 states have (on average 3.8883677877198397) internal successors, (63011), 16205 states have internal predecessors, (63011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:36,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16206 states to 16206 states and 63011 transitions. [2021-06-05 17:08:36,986 INFO L78 Accepts]: Start accepts. Automaton has 16206 states and 63011 transitions. Word has length 28 [2021-06-05 17:08:36,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:36,986 INFO L482 AbstractCegarLoop]: Abstraction has 16206 states and 63011 transitions. [2021-06-05 17:08:36,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:36,986 INFO L276 IsEmpty]: Start isEmpty. Operand 16206 states and 63011 transitions. [2021-06-05 17:08:37,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:37,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:37,011 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:37,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:37,226 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:37,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:37,226 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 114 times [2021-06-05 17:08:37,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:37,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991193919] [2021-06-05 17:08:37,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:37,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:37,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991193919] [2021-06-05 17:08:37,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991193919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:37,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797543218] [2021-06-05 17:08:37,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:37,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:08:37,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:37,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:08:37,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:37,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797543218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:37,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:37,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:08:37,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669920904] [2021-06-05 17:08:37,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:08:37,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:37,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:08:37,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:08:37,357 INFO L87 Difference]: Start difference. First operand 16206 states and 63011 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:37,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:37,965 INFO L93 Difference]: Finished difference Result 25358 states and 93325 transitions. [2021-06-05 17:08:37,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:08:37,965 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:37,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:38,033 INFO L225 Difference]: With dead ends: 25358 [2021-06-05 17:08:38,034 INFO L226 Difference]: Without dead ends: 25358 [2021-06-05 17:08:38,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 315.0ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:08:38,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25358 states. [2021-06-05 17:08:38,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25358 to 17371. [2021-06-05 17:08:38,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17371 states, 17370 states have (on average 3.8704663212435233) internal successors, (67230), 17370 states have internal predecessors, (67230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:38,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17371 states to 17371 states and 67230 transitions. [2021-06-05 17:08:38,475 INFO L78 Accepts]: Start accepts. Automaton has 17371 states and 67230 transitions. Word has length 28 [2021-06-05 17:08:38,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:38,475 INFO L482 AbstractCegarLoop]: Abstraction has 17371 states and 67230 transitions. [2021-06-05 17:08:38,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:38,476 INFO L276 IsEmpty]: Start isEmpty. Operand 17371 states and 67230 transitions. [2021-06-05 17:08:38,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:38,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:38,503 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:38,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:38,704 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:38,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:38,704 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 115 times [2021-06-05 17:08:38,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:38,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822914221] [2021-06-05 17:08:38,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:38,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:38,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822914221] [2021-06-05 17:08:38,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822914221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:38,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132093448] [2021-06-05 17:08:38,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:38,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:08:38,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:38,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132093448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:38,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:38,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 17:08:38,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534093962] [2021-06-05 17:08:38,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:08:38,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:38,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:08:38,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:08:38,826 INFO L87 Difference]: Start difference. First operand 17371 states and 67230 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:39,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:39,644 INFO L93 Difference]: Finished difference Result 28661 states and 104016 transitions. [2021-06-05 17:08:39,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:08:39,644 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:39,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:39,716 INFO L225 Difference]: With dead ends: 28661 [2021-06-05 17:08:39,716 INFO L226 Difference]: Without dead ends: 28661 [2021-06-05 17:08:39,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 426.1ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:08:39,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28661 states. [2021-06-05 17:08:40,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28661 to 17617. [2021-06-05 17:08:40,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17617 states, 17616 states have (on average 3.8848773841961854) internal successors, (68436), 17616 states have internal predecessors, (68436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17617 states to 17617 states and 68436 transitions. [2021-06-05 17:08:40,219 INFO L78 Accepts]: Start accepts. Automaton has 17617 states and 68436 transitions. Word has length 28 [2021-06-05 17:08:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:40,219 INFO L482 AbstractCegarLoop]: Abstraction has 17617 states and 68436 transitions. [2021-06-05 17:08:40,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:40,219 INFO L276 IsEmpty]: Start isEmpty. Operand 17617 states and 68436 transitions. [2021-06-05 17:08:40,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:40,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:40,245 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:40,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-05 17:08:40,445 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:40,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:40,445 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 85 times [2021-06-05 17:08:40,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:40,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033311712] [2021-06-05 17:08:40,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:40,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:40,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033311712] [2021-06-05 17:08:40,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033311712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:40,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196039996] [2021-06-05 17:08:40,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:40,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:40,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:40,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196039996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:40,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:40,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:08:40,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256985014] [2021-06-05 17:08:40,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:40,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:40,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:40,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:40,590 INFO L87 Difference]: Start difference. First operand 17617 states and 68436 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:41,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:41,994 INFO L93 Difference]: Finished difference Result 45772 states and 165843 transitions. [2021-06-05 17:08:41,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 17:08:41,994 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:41,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:42,105 INFO L225 Difference]: With dead ends: 45772 [2021-06-05 17:08:42,105 INFO L226 Difference]: Without dead ends: 45772 [2021-06-05 17:08:42,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 807.3ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 17:08:42,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45772 states. [2021-06-05 17:08:42,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45772 to 18979. [2021-06-05 17:08:42,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18979 states, 18978 states have (on average 3.92285804615871) internal successors, (74448), 18978 states have internal predecessors, (74448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18979 states to 18979 states and 74448 transitions. [2021-06-05 17:08:42,817 INFO L78 Accepts]: Start accepts. Automaton has 18979 states and 74448 transitions. Word has length 28 [2021-06-05 17:08:42,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:42,817 INFO L482 AbstractCegarLoop]: Abstraction has 18979 states and 74448 transitions. [2021-06-05 17:08:42,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:42,817 INFO L276 IsEmpty]: Start isEmpty. Operand 18979 states and 74448 transitions. [2021-06-05 17:08:42,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:42,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:42,845 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:43,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:43,046 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:43,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:43,046 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 86 times [2021-06-05 17:08:43,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:43,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169268680] [2021-06-05 17:08:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:43,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:43,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169268680] [2021-06-05 17:08:43,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169268680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:43,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833945208] [2021-06-05 17:08:43,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:43,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:08:43,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:43,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:43,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:43,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833945208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:43,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:43,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:08:43,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571714486] [2021-06-05 17:08:43,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:43,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:43,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:43,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:43,193 INFO L87 Difference]: Start difference. First operand 18979 states and 74448 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:44,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:44,625 INFO L93 Difference]: Finished difference Result 44697 states and 163047 transitions. [2021-06-05 17:08:44,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 17:08:44,625 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:44,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:44,746 INFO L225 Difference]: With dead ends: 44697 [2021-06-05 17:08:44,746 INFO L226 Difference]: Without dead ends: 44697 [2021-06-05 17:08:44,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 871.3ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 17:08:44,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44697 states. [2021-06-05 17:08:45,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44697 to 18947. [2021-06-05 17:08:45,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18947 states, 18946 states have (on average 3.919771983532144) internal successors, (74264), 18946 states have internal predecessors, (74264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:45,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18947 states to 18947 states and 74264 transitions. [2021-06-05 17:08:45,458 INFO L78 Accepts]: Start accepts. Automaton has 18947 states and 74264 transitions. Word has length 28 [2021-06-05 17:08:45,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:45,458 INFO L482 AbstractCegarLoop]: Abstraction has 18947 states and 74264 transitions. [2021-06-05 17:08:45,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:45,459 INFO L276 IsEmpty]: Start isEmpty. Operand 18947 states and 74264 transitions. [2021-06-05 17:08:45,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:45,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:45,487 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:45,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:45,688 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:45,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:45,688 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 116 times [2021-06-05 17:08:45,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:45,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006261491] [2021-06-05 17:08:45,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:45,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:45,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006261491] [2021-06-05 17:08:45,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006261491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:45,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891822742] [2021-06-05 17:08:45,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:45,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:08:45,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:45,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:08:45,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:45,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891822742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:45,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:45,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:08:45,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492406523] [2021-06-05 17:08:45,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:08:45,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:45,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:08:45,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:08:45,788 INFO L87 Difference]: Start difference. First operand 18947 states and 74264 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:46,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:46,075 INFO L93 Difference]: Finished difference Result 30407 states and 117873 transitions. [2021-06-05 17:08:46,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:08:46,075 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:46,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:46,154 INFO L225 Difference]: With dead ends: 30407 [2021-06-05 17:08:46,154 INFO L226 Difference]: Without dead ends: 30360 [2021-06-05 17:08:46,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:08:46,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30360 states. [2021-06-05 17:08:46,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30360 to 24152. [2021-06-05 17:08:46,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24152 states, 24151 states have (on average 3.923150180116765) internal successors, (94748), 24151 states have internal predecessors, (94748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:46,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24152 states to 24152 states and 94748 transitions. [2021-06-05 17:08:46,744 INFO L78 Accepts]: Start accepts. Automaton has 24152 states and 94748 transitions. Word has length 28 [2021-06-05 17:08:46,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:46,744 INFO L482 AbstractCegarLoop]: Abstraction has 24152 states and 94748 transitions. [2021-06-05 17:08:46,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:46,744 INFO L276 IsEmpty]: Start isEmpty. Operand 24152 states and 94748 transitions. [2021-06-05 17:08:46,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:46,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:46,779 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:46,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:46,987 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:46,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:46,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 117 times [2021-06-05 17:08:46,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:46,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629597678] [2021-06-05 17:08:46,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:46,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:47,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:47,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629597678] [2021-06-05 17:08:47,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629597678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:47,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139256482] [2021-06-05 17:08:47,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:47,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:08:47,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:47,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:08:47,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:47,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139256482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:47,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:47,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:08:47,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146915883] [2021-06-05 17:08:47,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:08:47,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:47,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:08:47,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:08:47,092 INFO L87 Difference]: Start difference. First operand 24152 states and 94748 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:47,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:47,369 INFO L93 Difference]: Finished difference Result 26900 states and 103096 transitions. [2021-06-05 17:08:47,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:08:47,369 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:47,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:47,449 INFO L225 Difference]: With dead ends: 26900 [2021-06-05 17:08:47,449 INFO L226 Difference]: Without dead ends: 26900 [2021-06-05 17:08:47,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:08:47,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26900 states. [2021-06-05 17:08:47,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26900 to 23655. [2021-06-05 17:08:47,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23655 states, 23654 states have (on average 3.913756658493278) internal successors, (92576), 23654 states have internal predecessors, (92576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:47,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23655 states to 23655 states and 92576 transitions. [2021-06-05 17:08:47,971 INFO L78 Accepts]: Start accepts. Automaton has 23655 states and 92576 transitions. Word has length 28 [2021-06-05 17:08:47,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:47,971 INFO L482 AbstractCegarLoop]: Abstraction has 23655 states and 92576 transitions. [2021-06-05 17:08:47,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:47,971 INFO L276 IsEmpty]: Start isEmpty. Operand 23655 states and 92576 transitions. [2021-06-05 17:08:48,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:48,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:48,010 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:48,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:48,214 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:48,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:48,214 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 118 times [2021-06-05 17:08:48,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:48,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489036317] [2021-06-05 17:08:48,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:48,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:48,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489036317] [2021-06-05 17:08:48,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489036317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:48,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484385967] [2021-06-05 17:08:48,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:48,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:08:48,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:48,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:48,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:48,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484385967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:48,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:48,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 17:08:48,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757072370] [2021-06-05 17:08:48,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:08:48,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:48,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:08:48,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:08:48,353 INFO L87 Difference]: Start difference. First operand 23655 states and 92576 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:49,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:49,208 INFO L93 Difference]: Finished difference Result 36284 states and 135440 transitions. [2021-06-05 17:08:49,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:08:49,209 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:49,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:49,305 INFO L225 Difference]: With dead ends: 36284 [2021-06-05 17:08:49,306 INFO L226 Difference]: Without dead ends: 36284 [2021-06-05 17:08:49,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 454.6ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:08:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36284 states. [2021-06-05 17:08:49,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36284 to 23725. [2021-06-05 17:08:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23725 states, 23724 states have (on average 3.911819254763109) internal successors, (92804), 23724 states have internal predecessors, (92804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23725 states to 23725 states and 92804 transitions. [2021-06-05 17:08:50,066 INFO L78 Accepts]: Start accepts. Automaton has 23725 states and 92804 transitions. Word has length 28 [2021-06-05 17:08:50,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:50,066 INFO L482 AbstractCegarLoop]: Abstraction has 23725 states and 92804 transitions. [2021-06-05 17:08:50,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:50,066 INFO L276 IsEmpty]: Start isEmpty. Operand 23725 states and 92804 transitions. [2021-06-05 17:08:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:50,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:50,108 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:50,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:50,308 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:50,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:50,309 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 119 times [2021-06-05 17:08:50,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:50,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572796698] [2021-06-05 17:08:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:50,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:50,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572796698] [2021-06-05 17:08:50,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572796698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:50,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586916114] [2021-06-05 17:08:50,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:50,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:08:50,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:50,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:50,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:50,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586916114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:50,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:50,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:08:50,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63809728] [2021-06-05 17:08:50,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:50,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:50,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:50,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:50,461 INFO L87 Difference]: Start difference. First operand 23725 states and 92804 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:51,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:51,862 INFO L93 Difference]: Finished difference Result 46767 states and 172486 transitions. [2021-06-05 17:08:51,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 17:08:51,862 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:51,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:51,993 INFO L225 Difference]: With dead ends: 46767 [2021-06-05 17:08:51,993 INFO L226 Difference]: Without dead ends: 46767 [2021-06-05 17:08:51,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 814.4ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 17:08:52,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46767 states. [2021-06-05 17:08:52,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46767 to 23724. [2021-06-05 17:08:52,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23724 states, 23723 states have (on average 3.913670277789487) internal successors, (92844), 23723 states have internal predecessors, (92844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23724 states to 23724 states and 92844 transitions. [2021-06-05 17:08:52,763 INFO L78 Accepts]: Start accepts. Automaton has 23724 states and 92844 transitions. Word has length 28 [2021-06-05 17:08:52,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:52,763 INFO L482 AbstractCegarLoop]: Abstraction has 23724 states and 92844 transitions. [2021-06-05 17:08:52,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:52,763 INFO L276 IsEmpty]: Start isEmpty. Operand 23724 states and 92844 transitions. [2021-06-05 17:08:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:52,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:52,800 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:53,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 17:08:53,000 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:53,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:53,001 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 120 times [2021-06-05 17:08:53,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:53,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845107420] [2021-06-05 17:08:53,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:53,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:53,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845107420] [2021-06-05 17:08:53,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845107420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:53,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287278549] [2021-06-05 17:08:53,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:53,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:08:53,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:53,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:53,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:53,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287278549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:53,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:53,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:08:53,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234540779] [2021-06-05 17:08:53,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:53,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:53,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:53,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:53,145 INFO L87 Difference]: Start difference. First operand 23724 states and 92844 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:54,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:54,600 INFO L93 Difference]: Finished difference Result 46491 states and 172131 transitions. [2021-06-05 17:08:54,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 17:08:54,601 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:54,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:54,728 INFO L225 Difference]: With dead ends: 46491 [2021-06-05 17:08:54,729 INFO L226 Difference]: Without dead ends: 46491 [2021-06-05 17:08:54,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 865.8ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 17:08:54,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46491 states. [2021-06-05 17:08:55,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46491 to 23508. [2021-06-05 17:08:55,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23508 states, 23507 states have (on average 3.9070064236184967) internal successors, (91842), 23507 states have internal predecessors, (91842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23508 states to 23508 states and 91842 transitions. [2021-06-05 17:08:55,524 INFO L78 Accepts]: Start accepts. Automaton has 23508 states and 91842 transitions. Word has length 28 [2021-06-05 17:08:55,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:55,524 INFO L482 AbstractCegarLoop]: Abstraction has 23508 states and 91842 transitions. [2021-06-05 17:08:55,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:55,524 INFO L276 IsEmpty]: Start isEmpty. Operand 23508 states and 91842 transitions. [2021-06-05 17:08:55,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:55,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:55,564 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:55,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 17:08:55,764 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:55,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:55,765 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 121 times [2021-06-05 17:08:55,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:55,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167288562] [2021-06-05 17:08:55,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:55,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:55,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167288562] [2021-06-05 17:08:55,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167288562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:55,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939571296] [2021-06-05 17:08:55,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:55,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:08:55,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 17:08:55,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939571296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:55,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:55,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 17:08:55,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723584430] [2021-06-05 17:08:55,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:08:55,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:55,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:08:55,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:08:55,863 INFO L87 Difference]: Start difference. First operand 23508 states and 91842 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:56,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:56,157 INFO L93 Difference]: Finished difference Result 35906 states and 134992 transitions. [2021-06-05 17:08:56,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:08:56,157 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:56,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:56,253 INFO L225 Difference]: With dead ends: 35906 [2021-06-05 17:08:56,253 INFO L226 Difference]: Without dead ends: 35889 [2021-06-05 17:08:56,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:08:56,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35889 states. [2021-06-05 17:08:56,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35889 to 23779. [2021-06-05 17:08:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23779 states, 23778 states have (on average 3.911514845655648) internal successors, (93008), 23778 states have internal predecessors, (93008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:56,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23779 states to 23779 states and 93008 transitions. [2021-06-05 17:08:56,855 INFO L78 Accepts]: Start accepts. Automaton has 23779 states and 93008 transitions. Word has length 28 [2021-06-05 17:08:56,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:56,855 INFO L482 AbstractCegarLoop]: Abstraction has 23779 states and 93008 transitions. [2021-06-05 17:08:56,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:56,855 INFO L276 IsEmpty]: Start isEmpty. Operand 23779 states and 93008 transitions. [2021-06-05 17:08:56,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:56,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:56,895 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:57,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 17:08:57,096 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:57,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:57,096 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 122 times [2021-06-05 17:08:57,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:57,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265813239] [2021-06-05 17:08:57,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:57,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:57,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265813239] [2021-06-05 17:08:57,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265813239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:57,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367401747] [2021-06-05 17:08:57,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:57,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:08:57,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:57,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:08:57,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 17:08:57,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367401747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:57,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:57,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 17:08:57,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418072439] [2021-06-05 17:08:57,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:08:57,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:57,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:08:57,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:08:57,198 INFO L87 Difference]: Start difference. First operand 23779 states and 93008 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:57,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:57,556 INFO L93 Difference]: Finished difference Result 38100 states and 141941 transitions. [2021-06-05 17:08:57,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:08:57,556 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:57,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:57,650 INFO L225 Difference]: With dead ends: 38100 [2021-06-05 17:08:57,650 INFO L226 Difference]: Without dead ends: 38100 [2021-06-05 17:08:57,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:08:57,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38100 states. [2021-06-05 17:08:58,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38100 to 23448. [2021-06-05 17:08:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23448 states, 23447 states have (on average 3.8990915682176825) internal successors, (91422), 23447 states have internal predecessors, (91422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23448 states to 23448 states and 91422 transitions. [2021-06-05 17:08:58,239 INFO L78 Accepts]: Start accepts. Automaton has 23448 states and 91422 transitions. Word has length 28 [2021-06-05 17:08:58,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:58,239 INFO L482 AbstractCegarLoop]: Abstraction has 23448 states and 91422 transitions. [2021-06-05 17:08:58,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:58,239 INFO L276 IsEmpty]: Start isEmpty. Operand 23448 states and 91422 transitions. [2021-06-05 17:08:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:58,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:58,273 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:58,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 17:08:58,474 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:58,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:58,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 123 times [2021-06-05 17:08:58,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:58,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044704702] [2021-06-05 17:08:58,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:58,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:58,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044704702] [2021-06-05 17:08:58,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044704702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:58,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314113752] [2021-06-05 17:08:58,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:58,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:08:58,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:58,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:58,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:58,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314113752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:58,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:58,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:08:58,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914127231] [2021-06-05 17:08:58,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:08:58,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:58,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:08:58,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:08:58,599 INFO L87 Difference]: Start difference. First operand 23448 states and 91422 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:59,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:59,322 INFO L93 Difference]: Finished difference Result 33419 states and 125361 transitions. [2021-06-05 17:08:59,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 17:08:59,323 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:08:59,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:59,409 INFO L225 Difference]: With dead ends: 33419 [2021-06-05 17:08:59,410 INFO L226 Difference]: Without dead ends: 33419 [2021-06-05 17:08:59,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 371.1ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:08:59,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33419 states. [2021-06-05 17:08:59,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33419 to 23496. [2021-06-05 17:08:59,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23496 states, 23495 states have (on average 3.8977654820174505) internal successors, (91578), 23495 states have internal predecessors, (91578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:00,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23496 states to 23496 states and 91578 transitions. [2021-06-05 17:09:00,031 INFO L78 Accepts]: Start accepts. Automaton has 23496 states and 91578 transitions. Word has length 28 [2021-06-05 17:09:00,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:00,031 INFO L482 AbstractCegarLoop]: Abstraction has 23496 states and 91578 transitions. [2021-06-05 17:09:00,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:00,031 INFO L276 IsEmpty]: Start isEmpty. Operand 23496 states and 91578 transitions. [2021-06-05 17:09:00,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:00,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:00,067 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:00,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-05 17:09:00,267 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:00,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:00,268 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 124 times [2021-06-05 17:09:00,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:00,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561582144] [2021-06-05 17:09:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:00,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:00,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561582144] [2021-06-05 17:09:00,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561582144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:00,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481850277] [2021-06-05 17:09:00,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:00,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:09:00,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:00,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:00,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:09:00,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481850277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:00,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:00,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:09:00,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383075634] [2021-06-05 17:09:00,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:09:00,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:00,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:09:00,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:09:00,395 INFO L87 Difference]: Start difference. First operand 23496 states and 91578 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:01,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:01,386 INFO L93 Difference]: Finished difference Result 35119 states and 130293 transitions. [2021-06-05 17:09:01,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 17:09:01,386 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:01,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:01,476 INFO L225 Difference]: With dead ends: 35119 [2021-06-05 17:09:01,476 INFO L226 Difference]: Without dead ends: 35119 [2021-06-05 17:09:01,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 564.7ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 17:09:01,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35119 states. [2021-06-05 17:09:02,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35119 to 24060. [2021-06-05 17:09:02,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24060 states, 24059 states have (on average 3.878964212976433) internal successors, (93324), 24059 states have internal predecessors, (93324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:02,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24060 states to 24060 states and 93324 transitions. [2021-06-05 17:09:02,130 INFO L78 Accepts]: Start accepts. Automaton has 24060 states and 93324 transitions. Word has length 28 [2021-06-05 17:09:02,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:02,130 INFO L482 AbstractCegarLoop]: Abstraction has 24060 states and 93324 transitions. [2021-06-05 17:09:02,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 24060 states and 93324 transitions. [2021-06-05 17:09:02,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:02,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:02,167 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:02,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:02,367 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:02,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:02,368 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 125 times [2021-06-05 17:09:02,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:02,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621294257] [2021-06-05 17:09:02,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:02,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:02,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621294257] [2021-06-05 17:09:02,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621294257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:02,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467686444] [2021-06-05 17:09:02,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:02,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:09:02,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:02,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:02,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:09:02,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467686444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:02,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:02,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:09:02,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091068776] [2021-06-05 17:09:02,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:09:02,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:02,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:09:02,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:09:02,495 INFO L87 Difference]: Start difference. First operand 24060 states and 93324 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:03,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:03,278 INFO L93 Difference]: Finished difference Result 34157 states and 127778 transitions. [2021-06-05 17:09:03,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:09:03,278 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:03,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:03,365 INFO L225 Difference]: With dead ends: 34157 [2021-06-05 17:09:03,365 INFO L226 Difference]: Without dead ends: 34153 [2021-06-05 17:09:03,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 412.4ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 17:09:03,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34153 states. [2021-06-05 17:09:03,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34153 to 23952. [2021-06-05 17:09:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23952 states, 23951 states have (on average 3.8814245751743144) internal successors, (92964), 23951 states have internal predecessors, (92964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23952 states to 23952 states and 92964 transitions. [2021-06-05 17:09:04,024 INFO L78 Accepts]: Start accepts. Automaton has 23952 states and 92964 transitions. Word has length 28 [2021-06-05 17:09:04,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:04,024 INFO L482 AbstractCegarLoop]: Abstraction has 23952 states and 92964 transitions. [2021-06-05 17:09:04,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand 23952 states and 92964 transitions. [2021-06-05 17:09:04,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:04,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:04,061 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:04,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 17:09:04,262 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:04,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:04,262 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 126 times [2021-06-05 17:09:04,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:04,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55307599] [2021-06-05 17:09:04,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:09:04,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:04,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55307599] [2021-06-05 17:09:04,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55307599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:04,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947613155] [2021-06-05 17:09:04,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:04,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:09:04,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:04,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:09:04,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 17:09:04,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947613155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:04,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:04,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 17:09:04,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388590542] [2021-06-05 17:09:04,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:09:04,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:04,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:09:04,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:09:04,364 INFO L87 Difference]: Start difference. First operand 23952 states and 92964 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:04,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:04,697 INFO L93 Difference]: Finished difference Result 30321 states and 113570 transitions. [2021-06-05 17:09:04,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:09:04,698 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:04,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:04,769 INFO L225 Difference]: With dead ends: 30321 [2021-06-05 17:09:04,769 INFO L226 Difference]: Without dead ends: 30321 [2021-06-05 17:09:04,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:09:04,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30321 states. [2021-06-05 17:09:05,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30321 to 24262. [2021-06-05 17:09:05,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24262 states, 24261 states have (on average 3.8735831169366475) internal successors, (93977), 24261 states have internal predecessors, (93977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:05,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24262 states to 24262 states and 93977 transitions. [2021-06-05 17:09:05,258 INFO L78 Accepts]: Start accepts. Automaton has 24262 states and 93977 transitions. Word has length 28 [2021-06-05 17:09:05,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:05,258 INFO L482 AbstractCegarLoop]: Abstraction has 24262 states and 93977 transitions. [2021-06-05 17:09:05,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:05,258 INFO L276 IsEmpty]: Start isEmpty. Operand 24262 states and 93977 transitions. [2021-06-05 17:09:05,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:05,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:05,293 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:05,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:05,494 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:05,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:05,494 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 127 times [2021-06-05 17:09:05,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:05,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899169976] [2021-06-05 17:09:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:05,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:05,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899169976] [2021-06-05 17:09:05,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899169976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:05,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524173902] [2021-06-05 17:09:05,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:05,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:05,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 17:09:05,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524173902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:05,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:05,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 17:09:05,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593370915] [2021-06-05 17:09:05,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:09:05,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:05,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:09:05,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:05,617 INFO L87 Difference]: Start difference. First operand 24262 states and 93977 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:06,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:06,418 INFO L93 Difference]: Finished difference Result 35215 states and 130243 transitions. [2021-06-05 17:09:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:09:06,418 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:06,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:06,505 INFO L225 Difference]: With dead ends: 35215 [2021-06-05 17:09:06,506 INFO L226 Difference]: Without dead ends: 35215 [2021-06-05 17:09:06,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 409.7ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:09:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35215 states. [2021-06-05 17:09:07,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35215 to 26047. [2021-06-05 17:09:07,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26047 states, 26046 states have (on average 3.8823235813560624) internal successors, (101119), 26046 states have internal predecessors, (101119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:07,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26047 states to 26047 states and 101119 transitions. [2021-06-05 17:09:07,182 INFO L78 Accepts]: Start accepts. Automaton has 26047 states and 101119 transitions. Word has length 28 [2021-06-05 17:09:07,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:07,182 INFO L482 AbstractCegarLoop]: Abstraction has 26047 states and 101119 transitions. [2021-06-05 17:09:07,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:07,182 INFO L276 IsEmpty]: Start isEmpty. Operand 26047 states and 101119 transitions. [2021-06-05 17:09:07,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:07,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:07,222 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:07,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:07,437 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:07,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:07,437 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 128 times [2021-06-05 17:09:07,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:07,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576401233] [2021-06-05 17:09:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:07,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:07,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576401233] [2021-06-05 17:09:07,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576401233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:07,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914873529] [2021-06-05 17:09:07,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:07,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:09:07,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:07,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:07,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 17:09:07,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914873529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:07,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:07,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 17:09:07,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702506582] [2021-06-05 17:09:07,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:09:07,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:07,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:09:07,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:07,551 INFO L87 Difference]: Start difference. First operand 26047 states and 101119 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:08,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:08,349 INFO L93 Difference]: Finished difference Result 33427 states and 125631 transitions. [2021-06-05 17:09:08,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:09:08,350 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:08,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:08,426 INFO L225 Difference]: With dead ends: 33427 [2021-06-05 17:09:08,426 INFO L226 Difference]: Without dead ends: 33415 [2021-06-05 17:09:08,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 331.1ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:09:08,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33415 states. [2021-06-05 17:09:08,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33415 to 26213. [2021-06-05 17:09:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26213 states, 26212 states have (on average 3.8773081031588585) internal successors, (101632), 26212 states have internal predecessors, (101632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:09,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26213 states to 26213 states and 101632 transitions. [2021-06-05 17:09:09,043 INFO L78 Accepts]: Start accepts. Automaton has 26213 states and 101632 transitions. Word has length 28 [2021-06-05 17:09:09,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:09,043 INFO L482 AbstractCegarLoop]: Abstraction has 26213 states and 101632 transitions. [2021-06-05 17:09:09,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:09,044 INFO L276 IsEmpty]: Start isEmpty. Operand 26213 states and 101632 transitions. [2021-06-05 17:09:09,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:09,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:09,084 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:09,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:09,284 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:09,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:09,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 129 times [2021-06-05 17:09:09,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:09,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611659779] [2021-06-05 17:09:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:09:09,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:09,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611659779] [2021-06-05 17:09:09,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611659779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:09,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744444307] [2021-06-05 17:09:09,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:09,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:09:09,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:09,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:09:09,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:09,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:09:09,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744444307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:09,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:09,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 17:09:09,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962420981] [2021-06-05 17:09:09,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:09:09,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:09,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:09:09,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:09:09,391 INFO L87 Difference]: Start difference. First operand 26213 states and 101632 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:09,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:09,636 INFO L93 Difference]: Finished difference Result 30773 states and 117208 transitions. [2021-06-05 17:09:09,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:09:09,637 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:09,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:09,710 INFO L225 Difference]: With dead ends: 30773 [2021-06-05 17:09:09,710 INFO L226 Difference]: Without dead ends: 30773 [2021-06-05 17:09:09,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:09:09,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30773 states. [2021-06-05 17:09:10,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30773 to 27420. [2021-06-05 17:09:10,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27420 states, 27419 states have (on average 3.8735183631788175) internal successors, (106208), 27419 states have internal predecessors, (106208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27420 states to 27420 states and 106208 transitions. [2021-06-05 17:09:10,286 INFO L78 Accepts]: Start accepts. Automaton has 27420 states and 106208 transitions. Word has length 28 [2021-06-05 17:09:10,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:10,286 INFO L482 AbstractCegarLoop]: Abstraction has 27420 states and 106208 transitions. [2021-06-05 17:09:10,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:10,286 INFO L276 IsEmpty]: Start isEmpty. Operand 27420 states and 106208 transitions. [2021-06-05 17:09:10,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:10,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:10,333 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:10,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-05 17:09:10,533 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:10,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:10,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 130 times [2021-06-05 17:09:10,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:10,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780925070] [2021-06-05 17:09:10,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:10,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:10,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780925070] [2021-06-05 17:09:10,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780925070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:10,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355725104] [2021-06-05 17:09:10,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:10,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:09:10,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:10,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:10,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:10,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355725104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:10,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:10,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 17:09:10,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673514690] [2021-06-05 17:09:10,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:09:10,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:10,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:09:10,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:10,649 INFO L87 Difference]: Start difference. First operand 27420 states and 106208 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:11,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:11,372 INFO L93 Difference]: Finished difference Result 35583 states and 132544 transitions. [2021-06-05 17:09:11,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 17:09:11,372 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:11,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:11,461 INFO L225 Difference]: With dead ends: 35583 [2021-06-05 17:09:11,462 INFO L226 Difference]: Without dead ends: 35583 [2021-06-05 17:09:11,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 371.4ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:09:11,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35583 states. [2021-06-05 17:09:12,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35583 to 28674. [2021-06-05 17:09:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28674 states, 28673 states have (on average 3.842116276636557) internal successors, (110165), 28673 states have internal predecessors, (110165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:12,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28674 states to 28674 states and 110165 transitions. [2021-06-05 17:09:12,226 INFO L78 Accepts]: Start accepts. Automaton has 28674 states and 110165 transitions. Word has length 28 [2021-06-05 17:09:12,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:12,226 INFO L482 AbstractCegarLoop]: Abstraction has 28674 states and 110165 transitions. [2021-06-05 17:09:12,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand 28674 states and 110165 transitions. [2021-06-05 17:09:12,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:12,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:12,276 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:12,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:12,477 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:12,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:12,477 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 131 times [2021-06-05 17:09:12,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:12,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169427077] [2021-06-05 17:09:12,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:12,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:12,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169427077] [2021-06-05 17:09:12,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169427077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:12,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082429699] [2021-06-05 17:09:12,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:12,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 17:09:12,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:12,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:12,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:12,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:12,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082429699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:12,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:12,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:09:12,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750407518] [2021-06-05 17:09:12,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:09:12,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:12,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:09:12,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:09:12,591 INFO L87 Difference]: Start difference. First operand 28674 states and 110165 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:13,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:13,153 INFO L93 Difference]: Finished difference Result 34707 states and 130204 transitions. [2021-06-05 17:09:13,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:09:13,154 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:13,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:13,237 INFO L225 Difference]: With dead ends: 34707 [2021-06-05 17:09:13,237 INFO L226 Difference]: Without dead ends: 34699 [2021-06-05 17:09:13,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:09:13,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34699 states. [2021-06-05 17:09:13,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34699 to 28480. [2021-06-05 17:09:13,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28480 states, 28479 states have (on average 3.847958144597774) internal successors, (109586), 28479 states have internal predecessors, (109586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28480 states to 28480 states and 109586 transitions. [2021-06-05 17:09:13,913 INFO L78 Accepts]: Start accepts. Automaton has 28480 states and 109586 transitions. Word has length 28 [2021-06-05 17:09:13,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:13,913 INFO L482 AbstractCegarLoop]: Abstraction has 28480 states and 109586 transitions. [2021-06-05 17:09:13,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:13,913 INFO L276 IsEmpty]: Start isEmpty. Operand 28480 states and 109586 transitions. [2021-06-05 17:09:13,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:13,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:13,962 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:14,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 17:09:14,162 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:14,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:14,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 132 times [2021-06-05 17:09:14,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:14,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570487891] [2021-06-05 17:09:14,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:14,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:14,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570487891] [2021-06-05 17:09:14,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570487891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:14,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484146096] [2021-06-05 17:09:14,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:14,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:09:14,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:14,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:14,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:14,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484146096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:14,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:14,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:09:14,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131343756] [2021-06-05 17:09:14,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:09:14,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:14,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:09:14,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:09:14,271 INFO L87 Difference]: Start difference. First operand 28480 states and 109586 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:15,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:15,088 INFO L93 Difference]: Finished difference Result 36567 states and 135873 transitions. [2021-06-05 17:09:15,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 17:09:15,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:15,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:15,177 INFO L225 Difference]: With dead ends: 36567 [2021-06-05 17:09:15,177 INFO L226 Difference]: Without dead ends: 36567 [2021-06-05 17:09:15,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 346.9ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:09:15,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36567 states. [2021-06-05 17:09:15,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36567 to 29508. [2021-06-05 17:09:15,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29508 states, 29507 states have (on average 3.8260073880774055) internal successors, (112894), 29507 states have internal predecessors, (112894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:15,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29508 states to 29508 states and 112894 transitions. [2021-06-05 17:09:15,846 INFO L78 Accepts]: Start accepts. Automaton has 29508 states and 112894 transitions. Word has length 28 [2021-06-05 17:09:15,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:15,846 INFO L482 AbstractCegarLoop]: Abstraction has 29508 states and 112894 transitions. [2021-06-05 17:09:15,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:15,846 INFO L276 IsEmpty]: Start isEmpty. Operand 29508 states and 112894 transitions. [2021-06-05 17:09:15,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:15,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:15,895 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:16,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 17:09:16,096 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:16,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:16,096 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 133 times [2021-06-05 17:09:16,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:16,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347029215] [2021-06-05 17:09:16,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:16,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:16,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347029215] [2021-06-05 17:09:16,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347029215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:16,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153531915] [2021-06-05 17:09:16,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:16,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:09:16,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:16,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153531915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:16,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:16,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 17:09:16,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644842113] [2021-06-05 17:09:16,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:09:16,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:16,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:09:16,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:09:16,192 INFO L87 Difference]: Start difference. First operand 29508 states and 112894 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:16,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:16,545 INFO L93 Difference]: Finished difference Result 35843 states and 136177 transitions. [2021-06-05 17:09:16,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:09:16,545 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:16,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:16,637 INFO L225 Difference]: With dead ends: 35843 [2021-06-05 17:09:16,637 INFO L226 Difference]: Without dead ends: 35830 [2021-06-05 17:09:16,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:09:16,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35830 states. [2021-06-05 17:09:17,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35830 to 34303. [2021-06-05 17:09:17,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34303 states, 34302 states have (on average 3.8411171360270537) internal successors, (131758), 34302 states have internal predecessors, (131758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34303 states to 34303 states and 131758 transitions. [2021-06-05 17:09:17,382 INFO L78 Accepts]: Start accepts. Automaton has 34303 states and 131758 transitions. Word has length 28 [2021-06-05 17:09:17,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:17,382 INFO L482 AbstractCegarLoop]: Abstraction has 34303 states and 131758 transitions. [2021-06-05 17:09:17,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:17,382 INFO L276 IsEmpty]: Start isEmpty. Operand 34303 states and 131758 transitions. [2021-06-05 17:09:17,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:17,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:17,438 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:17,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 17:09:17,639 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:17,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:17,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 134 times [2021-06-05 17:09:17,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:17,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658141248] [2021-06-05 17:09:17,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:17,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:17,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658141248] [2021-06-05 17:09:17,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658141248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:17,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253005074] [2021-06-05 17:09:17,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:17,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:09:17,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:17,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:09:17,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:17,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253005074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:17,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:17,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 17:09:17,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808125249] [2021-06-05 17:09:17,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:09:17,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:17,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:09:17,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:09:17,739 INFO L87 Difference]: Start difference. First operand 34303 states and 131758 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:18,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:18,255 INFO L93 Difference]: Finished difference Result 37460 states and 141660 transitions. [2021-06-05 17:09:18,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:09:18,256 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:18,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:18,361 INFO L225 Difference]: With dead ends: 37460 [2021-06-05 17:09:18,361 INFO L226 Difference]: Without dead ends: 37460 [2021-06-05 17:09:18,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:09:18,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37460 states. [2021-06-05 17:09:19,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37460 to 33980. [2021-06-05 17:09:19,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33980 states, 33979 states have (on average 3.8373995703228463) internal successors, (130391), 33979 states have internal predecessors, (130391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33980 states to 33980 states and 130391 transitions. [2021-06-05 17:09:19,260 INFO L78 Accepts]: Start accepts. Automaton has 33980 states and 130391 transitions. Word has length 28 [2021-06-05 17:09:19,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:19,260 INFO L482 AbstractCegarLoop]: Abstraction has 33980 states and 130391 transitions. [2021-06-05 17:09:19,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:19,260 INFO L276 IsEmpty]: Start isEmpty. Operand 33980 states and 130391 transitions. [2021-06-05 17:09:19,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:19,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:19,318 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:19,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:19,518 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:19,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:19,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 135 times [2021-06-05 17:09:19,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:19,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739402080] [2021-06-05 17:09:19,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:19,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:19,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739402080] [2021-06-05 17:09:19,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739402080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:19,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070400252] [2021-06-05 17:09:19,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:19,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:09:19,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:19,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:19,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:19,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070400252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:19,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:19,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:09:19,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401570629] [2021-06-05 17:09:19,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:09:19,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:19,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:09:19,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:09:19,623 INFO L87 Difference]: Start difference. First operand 33980 states and 130391 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:20,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:20,202 INFO L93 Difference]: Finished difference Result 40756 states and 152783 transitions. [2021-06-05 17:09:20,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:09:20,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:20,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:20,310 INFO L225 Difference]: With dead ends: 40756 [2021-06-05 17:09:20,310 INFO L226 Difference]: Without dead ends: 40748 [2021-06-05 17:09:20,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 244.2ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:09:20,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40748 states. [2021-06-05 17:09:21,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40748 to 33946. [2021-06-05 17:09:21,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33946 states, 33945 states have (on average 3.8377964354102225) internal successors, (130274), 33945 states have internal predecessors, (130274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33946 states to 33946 states and 130274 transitions. [2021-06-05 17:09:21,159 INFO L78 Accepts]: Start accepts. Automaton has 33946 states and 130274 transitions. Word has length 28 [2021-06-05 17:09:21,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:21,159 INFO L482 AbstractCegarLoop]: Abstraction has 33946 states and 130274 transitions. [2021-06-05 17:09:21,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:21,159 INFO L276 IsEmpty]: Start isEmpty. Operand 33946 states and 130274 transitions. [2021-06-05 17:09:21,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:21,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:21,216 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:21,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-05 17:09:21,416 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:21,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:21,416 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 136 times [2021-06-05 17:09:21,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:21,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74603309] [2021-06-05 17:09:21,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:09:21,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:21,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74603309] [2021-06-05 17:09:21,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74603309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:21,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491479484] [2021-06-05 17:09:21,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:21,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:09:21,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:21,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:09:21,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:09:21,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491479484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:21,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:21,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 17:09:21,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429806535] [2021-06-05 17:09:21,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:09:21,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:21,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:09:21,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:09:21,516 INFO L87 Difference]: Start difference. First operand 33946 states and 130274 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:21,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:21,918 INFO L93 Difference]: Finished difference Result 36862 states and 139999 transitions. [2021-06-05 17:09:21,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:09:21,918 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:21,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:22,013 INFO L225 Difference]: With dead ends: 36862 [2021-06-05 17:09:22,013 INFO L226 Difference]: Without dead ends: 36862 [2021-06-05 17:09:22,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 168.6ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:09:22,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36862 states. [2021-06-05 17:09:22,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36862 to 34478. [2021-06-05 17:09:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34478 states, 34477 states have (on average 3.8361226324796243) internal successors, (132258), 34477 states have internal predecessors, (132258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:22,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34478 states to 34478 states and 132258 transitions. [2021-06-05 17:09:22,886 INFO L78 Accepts]: Start accepts. Automaton has 34478 states and 132258 transitions. Word has length 28 [2021-06-05 17:09:22,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:22,886 INFO L482 AbstractCegarLoop]: Abstraction has 34478 states and 132258 transitions. [2021-06-05 17:09:22,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 34478 states and 132258 transitions. [2021-06-05 17:09:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:22,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:22,944 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:23,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:23,145 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:23,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:23,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 137 times [2021-06-05 17:09:23,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:23,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192596650] [2021-06-05 17:09:23,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:09:23,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:23,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192596650] [2021-06-05 17:09:23,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192596650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:23,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957354555] [2021-06-05 17:09:23,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:23,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:09:23,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:23,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:23,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:09:23,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957354555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:23,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:23,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:09:23,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597181284] [2021-06-05 17:09:23,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:09:23,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:23,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:09:23,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:09:23,249 INFO L87 Difference]: Start difference. First operand 34478 states and 132258 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:23,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:23,828 INFO L93 Difference]: Finished difference Result 41641 states and 156125 transitions. [2021-06-05 17:09:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:09:23,828 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:23,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:23,938 INFO L225 Difference]: With dead ends: 41641 [2021-06-05 17:09:23,938 INFO L226 Difference]: Without dead ends: 41617 [2021-06-05 17:09:23,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:09:23,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41617 states. [2021-06-05 17:09:24,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41617 to 34650. [2021-06-05 17:09:24,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34650 states, 34649 states have (on average 3.832491558197928) internal successors, (132792), 34649 states have internal predecessors, (132792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34650 states to 34650 states and 132792 transitions. [2021-06-05 17:09:24,761 INFO L78 Accepts]: Start accepts. Automaton has 34650 states and 132792 transitions. Word has length 28 [2021-06-05 17:09:24,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:24,762 INFO L482 AbstractCegarLoop]: Abstraction has 34650 states and 132792 transitions. [2021-06-05 17:09:24,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:24,762 INFO L276 IsEmpty]: Start isEmpty. Operand 34650 states and 132792 transitions. [2021-06-05 17:09:24,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:24,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:24,820 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:25,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-05 17:09:25,021 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:25,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:25,021 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 138 times [2021-06-05 17:09:25,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:25,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986839363] [2021-06-05 17:09:25,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:25,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:25,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986839363] [2021-06-05 17:09:25,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986839363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:25,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133007865] [2021-06-05 17:09:25,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:25,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:09:25,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:25,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:09:25,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:25,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133007865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:25,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:25,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 17:09:25,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629144543] [2021-06-05 17:09:25,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:09:25,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:25,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:09:25,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:09:25,127 INFO L87 Difference]: Start difference. First operand 34650 states and 132792 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:25,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:25,599 INFO L93 Difference]: Finished difference Result 37282 states and 141492 transitions. [2021-06-05 17:09:25,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:09:25,599 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:25,700 INFO L225 Difference]: With dead ends: 37282 [2021-06-05 17:09:25,700 INFO L226 Difference]: Without dead ends: 37282 [2021-06-05 17:09:25,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 198.5ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:09:25,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37282 states. [2021-06-05 17:09:26,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37282 to 34576. [2021-06-05 17:09:26,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34576 states, 34575 states have (on average 3.833289949385394) internal successors, (132536), 34575 states have internal predecessors, (132536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:26,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34576 states to 34576 states and 132536 transitions. [2021-06-05 17:09:26,574 INFO L78 Accepts]: Start accepts. Automaton has 34576 states and 132536 transitions. Word has length 28 [2021-06-05 17:09:26,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:26,574 INFO L482 AbstractCegarLoop]: Abstraction has 34576 states and 132536 transitions. [2021-06-05 17:09:26,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:26,574 INFO L276 IsEmpty]: Start isEmpty. Operand 34576 states and 132536 transitions. [2021-06-05 17:09:26,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:26,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:26,632 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:26,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:26,832 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:26,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:26,833 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 139 times [2021-06-05 17:09:26,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:26,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864820101] [2021-06-05 17:09:26,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:26,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:26,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864820101] [2021-06-05 17:09:26,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864820101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:26,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742523427] [2021-06-05 17:09:26,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:26,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:26,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:26,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742523427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:26,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:26,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 17:09:26,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266437866] [2021-06-05 17:09:26,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:09:26,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:26,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:09:26,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:26,943 INFO L87 Difference]: Start difference. First operand 34576 states and 132536 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:27,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:27,588 INFO L93 Difference]: Finished difference Result 41564 states and 155866 transitions. [2021-06-05 17:09:27,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 17:09:27,589 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:27,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:27,698 INFO L225 Difference]: With dead ends: 41564 [2021-06-05 17:09:27,698 INFO L226 Difference]: Without dead ends: 41524 [2021-06-05 17:09:27,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 294.6ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:09:27,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41524 states. [2021-06-05 17:09:28,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41524 to 34750. [2021-06-05 17:09:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34750 states, 34749 states have (on average 3.829549051771274) internal successors, (133073), 34749 states have internal predecessors, (133073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:28,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34750 states to 34750 states and 133073 transitions. [2021-06-05 17:09:28,558 INFO L78 Accepts]: Start accepts. Automaton has 34750 states and 133073 transitions. Word has length 28 [2021-06-05 17:09:28,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:28,559 INFO L482 AbstractCegarLoop]: Abstraction has 34750 states and 133073 transitions. [2021-06-05 17:09:28,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:28,559 INFO L276 IsEmpty]: Start isEmpty. Operand 34750 states and 133073 transitions. [2021-06-05 17:09:28,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:28,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:28,620 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:28,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-05 17:09:28,820 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:28,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:28,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 140 times [2021-06-05 17:09:28,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:28,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057472570] [2021-06-05 17:09:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:28,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:28,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057472570] [2021-06-05 17:09:28,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057472570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:28,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321785034] [2021-06-05 17:09:28,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:28,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:09:28,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:28,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:28,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:28,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321785034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:28,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:28,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:09:28,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826848004] [2021-06-05 17:09:28,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:09:28,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:28,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:09:28,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:09:28,971 INFO L87 Difference]: Start difference. First operand 34750 states and 133073 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:30,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:30,382 INFO L93 Difference]: Finished difference Result 77130 states and 285331 transitions. [2021-06-05 17:09:30,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 17:09:30,383 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:30,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:30,572 INFO L225 Difference]: With dead ends: 77130 [2021-06-05 17:09:30,573 INFO L226 Difference]: Without dead ends: 77130 [2021-06-05 17:09:30,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 610.5ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 17:09:30,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77130 states. [2021-06-05 17:09:32,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77130 to 43844. [2021-06-05 17:09:32,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43844 states, 43843 states have (on average 3.9042264443582786) internal successors, (171173), 43843 states have internal predecessors, (171173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:32,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43844 states to 43844 states and 171173 transitions. [2021-06-05 17:09:32,262 INFO L78 Accepts]: Start accepts. Automaton has 43844 states and 171173 transitions. Word has length 28 [2021-06-05 17:09:32,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:32,262 INFO L482 AbstractCegarLoop]: Abstraction has 43844 states and 171173 transitions. [2021-06-05 17:09:32,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:32,262 INFO L276 IsEmpty]: Start isEmpty. Operand 43844 states and 171173 transitions. [2021-06-05 17:09:32,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:32,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:32,334 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:32,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:32,535 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:32,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:32,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 141 times [2021-06-05 17:09:32,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:32,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323578087] [2021-06-05 17:09:32,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:32,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:32,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323578087] [2021-06-05 17:09:32,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323578087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:32,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059935924] [2021-06-05 17:09:32,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:32,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:09:32,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:32,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:32,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:32,836 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 1 [2021-06-05 17:09:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:32,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059935924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:32,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:32,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:09:32,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870193238] [2021-06-05 17:09:32,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:09:32,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:32,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:09:32,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:09:32,841 INFO L87 Difference]: Start difference. First operand 43844 states and 171173 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:34,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:34,116 INFO L93 Difference]: Finished difference Result 76528 states and 283739 transitions. [2021-06-05 17:09:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 17:09:34,116 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:34,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:34,340 INFO L225 Difference]: With dead ends: 76528 [2021-06-05 17:09:34,340 INFO L226 Difference]: Without dead ends: 76528 [2021-06-05 17:09:34,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 619.0ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 17:09:34,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76528 states. [2021-06-05 17:09:35,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76528 to 43841. [2021-06-05 17:09:35,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43841 states, 43840 states have (on average 3.9041742700729927) internal successors, (171159), 43840 states have internal predecessors, (171159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:36,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43841 states to 43841 states and 171159 transitions. [2021-06-05 17:09:36,092 INFO L78 Accepts]: Start accepts. Automaton has 43841 states and 171159 transitions. Word has length 28 [2021-06-05 17:09:36,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:36,093 INFO L482 AbstractCegarLoop]: Abstraction has 43841 states and 171159 transitions. [2021-06-05 17:09:36,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:36,093 INFO L276 IsEmpty]: Start isEmpty. Operand 43841 states and 171159 transitions. [2021-06-05 17:09:36,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:36,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:36,176 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:36,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable420,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:36,376 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:36,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:36,377 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 142 times [2021-06-05 17:09:36,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:36,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046013904] [2021-06-05 17:09:36,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:36,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:36,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046013904] [2021-06-05 17:09:36,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046013904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:36,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159968142] [2021-06-05 17:09:36,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:36,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:09:36,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:36,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:36,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:36,807 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 17:09:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:36,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159968142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:36,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:36,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:09:36,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907356632] [2021-06-05 17:09:36,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:09:36,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:36,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:09:36,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:09:36,826 INFO L87 Difference]: Start difference. First operand 43841 states and 171159 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:38,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:38,107 INFO L93 Difference]: Finished difference Result 71140 states and 265637 transitions. [2021-06-05 17:09:38,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 17:09:38,107 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:38,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:38,444 INFO L225 Difference]: With dead ends: 71140 [2021-06-05 17:09:38,444 INFO L226 Difference]: Without dead ends: 71140 [2021-06-05 17:09:38,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 559.3ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 17:09:38,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71140 states. [2021-06-05 17:09:39,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71140 to 43865. [2021-06-05 17:09:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43865 states, 43864 states have (on average 3.9044090826190043) internal successors, (171263), 43864 states have internal predecessors, (171263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43865 states to 43865 states and 171263 transitions. [2021-06-05 17:09:40,045 INFO L78 Accepts]: Start accepts. Automaton has 43865 states and 171263 transitions. Word has length 28 [2021-06-05 17:09:40,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:40,045 INFO L482 AbstractCegarLoop]: Abstraction has 43865 states and 171263 transitions. [2021-06-05 17:09:40,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:40,045 INFO L276 IsEmpty]: Start isEmpty. Operand 43865 states and 171263 transitions. [2021-06-05 17:09:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:40,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:40,116 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:40,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 17:09:40,317 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:40,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:40,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 143 times [2021-06-05 17:09:40,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:40,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5645568] [2021-06-05 17:09:40,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:40,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:40,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5645568] [2021-06-05 17:09:40,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5645568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:40,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427140256] [2021-06-05 17:09:40,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:40,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:09:40,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:40,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:40,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:40,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427140256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:40,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:40,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:09:40,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448464962] [2021-06-05 17:09:40,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:09:40,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:40,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:09:40,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:09:40,446 INFO L87 Difference]: Start difference. First operand 43865 states and 171263 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:41,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:41,815 INFO L93 Difference]: Finished difference Result 70268 states and 263382 transitions. [2021-06-05 17:09:41,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 17:09:41,815 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:41,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:42,013 INFO L225 Difference]: With dead ends: 70268 [2021-06-05 17:09:42,013 INFO L226 Difference]: Without dead ends: 70260 [2021-06-05 17:09:42,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 647.9ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:09:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70260 states. [2021-06-05 17:09:43,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70260 to 43865. [2021-06-05 17:09:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43865 states, 43864 states have (on average 3.904272296188218) internal successors, (171257), 43864 states have internal predecessors, (171257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:43,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43865 states to 43865 states and 171257 transitions. [2021-06-05 17:09:43,622 INFO L78 Accepts]: Start accepts. Automaton has 43865 states and 171257 transitions. Word has length 28 [2021-06-05 17:09:43,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:43,622 INFO L482 AbstractCegarLoop]: Abstraction has 43865 states and 171257 transitions. [2021-06-05 17:09:43,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:43,622 INFO L276 IsEmpty]: Start isEmpty. Operand 43865 states and 171257 transitions. [2021-06-05 17:09:43,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:43,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:43,855 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:44,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 17:09:44,072 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:44,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:44,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 144 times [2021-06-05 17:09:44,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:44,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100310681] [2021-06-05 17:09:44,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:44,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:44,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100310681] [2021-06-05 17:09:44,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100310681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:44,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738603161] [2021-06-05 17:09:44,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:44,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:09:44,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:44,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:44,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:44,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738603161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:44,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:44,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:09:44,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580613619] [2021-06-05 17:09:44,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:09:44,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:44,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:09:44,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:09:44,215 INFO L87 Difference]: Start difference. First operand 43865 states and 171257 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:45,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:45,667 INFO L93 Difference]: Finished difference Result 69775 states and 262075 transitions. [2021-06-05 17:09:45,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 17:09:45,667 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:45,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:45,868 INFO L225 Difference]: With dead ends: 69775 [2021-06-05 17:09:45,868 INFO L226 Difference]: Without dead ends: 69775 [2021-06-05 17:09:45,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 555.0ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 17:09:45,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69775 states. [2021-06-05 17:09:47,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69775 to 43873. [2021-06-05 17:09:47,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43873 states, 43872 states have (on average 3.9043353391684903) internal successors, (171291), 43872 states have internal predecessors, (171291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:47,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43873 states to 43873 states and 171291 transitions. [2021-06-05 17:09:47,726 INFO L78 Accepts]: Start accepts. Automaton has 43873 states and 171291 transitions. Word has length 28 [2021-06-05 17:09:47,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:47,726 INFO L482 AbstractCegarLoop]: Abstraction has 43873 states and 171291 transitions. [2021-06-05 17:09:47,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:47,726 INFO L276 IsEmpty]: Start isEmpty. Operand 43873 states and 171291 transitions. [2021-06-05 17:09:47,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:47,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:47,798 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:48,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-05 17:09:48,014 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:48,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:48,014 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 145 times [2021-06-05 17:09:48,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:48,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515294035] [2021-06-05 17:09:48,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:48,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:48,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515294035] [2021-06-05 17:09:48,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515294035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:48,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046996206] [2021-06-05 17:09:48,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:48,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:48,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:48,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:48,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046996206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:48,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:48,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:09:48,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13332330] [2021-06-05 17:09:48,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:09:48,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:48,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:09:48,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:09:48,154 INFO L87 Difference]: Start difference. First operand 43873 states and 171291 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:49,197 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-06-05 17:09:49,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:49,671 INFO L93 Difference]: Finished difference Result 69542 states and 261491 transitions. [2021-06-05 17:09:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:09:49,672 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:49,875 INFO L225 Difference]: With dead ends: 69542 [2021-06-05 17:09:49,876 INFO L226 Difference]: Without dead ends: 69534 [2021-06-05 17:09:49,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 877.7ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 17:09:49,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69534 states. [2021-06-05 17:09:51,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69534 to 43873. [2021-06-05 17:09:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43873 states, 43872 states have (on average 3.9042897520058353) internal successors, (171289), 43872 states have internal predecessors, (171289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43873 states to 43873 states and 171289 transitions. [2021-06-05 17:09:51,862 INFO L78 Accepts]: Start accepts. Automaton has 43873 states and 171289 transitions. Word has length 28 [2021-06-05 17:09:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:51,862 INFO L482 AbstractCegarLoop]: Abstraction has 43873 states and 171289 transitions. [2021-06-05 17:09:51,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:51,862 INFO L276 IsEmpty]: Start isEmpty. Operand 43873 states and 171289 transitions. [2021-06-05 17:09:51,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:51,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:51,941 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:52,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 17:09:52,149 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:52,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:52,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 146 times [2021-06-05 17:09:52,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:52,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880225093] [2021-06-05 17:09:52,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:52,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:52,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880225093] [2021-06-05 17:09:52,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880225093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:52,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537320890] [2021-06-05 17:09:52,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:52,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:09:52,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:52,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:52,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:52,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537320890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:52,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:52,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 17:09:52,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38950492] [2021-06-05 17:09:52,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:09:52,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:52,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:09:52,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:09:52,287 INFO L87 Difference]: Start difference. First operand 43873 states and 171289 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:53,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:53,633 INFO L93 Difference]: Finished difference Result 69043 states and 258242 transitions. [2021-06-05 17:09:53,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 17:09:53,633 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:53,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:53,822 INFO L225 Difference]: With dead ends: 69043 [2021-06-05 17:09:53,822 INFO L226 Difference]: Without dead ends: 69043 [2021-06-05 17:09:53,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 583.6ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 17:09:53,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69043 states. [2021-06-05 17:09:55,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69043 to 47103. [2021-06-05 17:09:55,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47103 states, 47102 states have (on average 3.907965691478069) internal successors, (184073), 47102 states have internal predecessors, (184073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47103 states to 47103 states and 184073 transitions. [2021-06-05 17:09:55,646 INFO L78 Accepts]: Start accepts. Automaton has 47103 states and 184073 transitions. Word has length 28 [2021-06-05 17:09:55,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:55,646 INFO L482 AbstractCegarLoop]: Abstraction has 47103 states and 184073 transitions. [2021-06-05 17:09:55,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:55,646 INFO L276 IsEmpty]: Start isEmpty. Operand 47103 states and 184073 transitions. [2021-06-05 17:09:55,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:55,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:55,725 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:55,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-06-05 17:09:55,926 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:55,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:55,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 147 times [2021-06-05 17:09:55,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:55,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977458210] [2021-06-05 17:09:55,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:55,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:55,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977458210] [2021-06-05 17:09:55,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977458210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:55,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683334813] [2021-06-05 17:09:55,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:55,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:09:55,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:55,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:55,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:56,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683334813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:56,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:56,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 17:09:56,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687452883] [2021-06-05 17:09:56,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:09:56,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:56,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:09:56,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:09:56,050 INFO L87 Difference]: Start difference. First operand 47103 states and 184073 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:57,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:57,252 INFO L93 Difference]: Finished difference Result 68545 states and 256931 transitions. [2021-06-05 17:09:57,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 17:09:57,252 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:09:57,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:57,462 INFO L225 Difference]: With dead ends: 68545 [2021-06-05 17:09:57,462 INFO L226 Difference]: Without dead ends: 68537 [2021-06-05 17:09:57,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 452.0ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:09:57,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68537 states. [2021-06-05 17:09:58,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68537 to 46797. [2021-06-05 17:09:58,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46797 states, 46796 states have (on average 3.913283186597145) internal successors, (183126), 46796 states have internal predecessors, (183126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:59,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46797 states to 46797 states and 183126 transitions. [2021-06-05 17:09:59,057 INFO L78 Accepts]: Start accepts. Automaton has 46797 states and 183126 transitions. Word has length 28 [2021-06-05 17:09:59,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:59,057 INFO L482 AbstractCegarLoop]: Abstraction has 46797 states and 183126 transitions. [2021-06-05 17:09:59,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:59,058 INFO L276 IsEmpty]: Start isEmpty. Operand 46797 states and 183126 transitions. [2021-06-05 17:09:59,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:59,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:59,132 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:59,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:59,332 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:59,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:59,332 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 148 times [2021-06-05 17:09:59,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:59,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670908720] [2021-06-05 17:09:59,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:59,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:59,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670908720] [2021-06-05 17:09:59,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670908720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:59,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813326562] [2021-06-05 17:09:59,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:59,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:09:59,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:59,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:59,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:59,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813326562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:59,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:59,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 17:09:59,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607607042] [2021-06-05 17:09:59,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:09:59,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:59,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:09:59,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:09:59,456 INFO L87 Difference]: Start difference. First operand 46797 states and 183126 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:00,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:00,534 INFO L93 Difference]: Finished difference Result 66948 states and 252499 transitions. [2021-06-05 17:10:00,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:10:00,535 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:10:00,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:00,728 INFO L225 Difference]: With dead ends: 66948 [2021-06-05 17:10:00,728 INFO L226 Difference]: Without dead ends: 66924 [2021-06-05 17:10:00,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 564.6ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:10:00,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66924 states. [2021-06-05 17:10:02,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66924 to 46693. [2021-06-05 17:10:02,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46693 states, 46692 states have (on average 3.9132613723978413) internal successors, (182718), 46692 states have internal predecessors, (182718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:02,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46693 states to 46693 states and 182718 transitions. [2021-06-05 17:10:02,559 INFO L78 Accepts]: Start accepts. Automaton has 46693 states and 182718 transitions. Word has length 28 [2021-06-05 17:10:02,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:02,559 INFO L482 AbstractCegarLoop]: Abstraction has 46693 states and 182718 transitions. [2021-06-05 17:10:02,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:02,559 INFO L276 IsEmpty]: Start isEmpty. Operand 46693 states and 182718 transitions. [2021-06-05 17:10:02,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:10:02,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:02,650 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:02,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:02,866 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:02,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:02,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 149 times [2021-06-05 17:10:02,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:02,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887334057] [2021-06-05 17:10:02,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:02,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:02,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887334057] [2021-06-05 17:10:02,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887334057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:02,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91701297] [2021-06-05 17:10:02,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:02,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:10:02,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:02,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:02,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:03,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91701297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:03,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:03,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:10:03,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754374085] [2021-06-05 17:10:03,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:10:03,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:03,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:10:03,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:10:03,032 INFO L87 Difference]: Start difference. First operand 46693 states and 182718 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:04,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:04,351 INFO L93 Difference]: Finished difference Result 68144 states and 255825 transitions. [2021-06-05 17:10:04,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 17:10:04,352 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:10:04,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:04,817 INFO L225 Difference]: With dead ends: 68144 [2021-06-05 17:10:04,817 INFO L226 Difference]: Without dead ends: 68144 [2021-06-05 17:10:04,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 625.7ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 17:10:04,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68144 states. [2021-06-05 17:10:06,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68144 to 46789. [2021-06-05 17:10:06,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46789 states, 46788 states have (on average 3.9119432333076856) internal successors, (183032), 46788 states have internal predecessors, (183032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:06,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46789 states to 46789 states and 183032 transitions. [2021-06-05 17:10:06,225 INFO L78 Accepts]: Start accepts. Automaton has 46789 states and 183032 transitions. Word has length 28 [2021-06-05 17:10:06,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:06,225 INFO L482 AbstractCegarLoop]: Abstraction has 46789 states and 183032 transitions. [2021-06-05 17:10:06,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:06,225 INFO L276 IsEmpty]: Start isEmpty. Operand 46789 states and 183032 transitions. [2021-06-05 17:10:06,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:10:06,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:06,306 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:06,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:06,513 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:06,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:06,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 150 times [2021-06-05 17:10:06,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:06,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915217957] [2021-06-05 17:10:06,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:06,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:06,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915217957] [2021-06-05 17:10:06,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915217957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:06,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699088932] [2021-06-05 17:10:06,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:06,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:10:06,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:06,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:06,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:06,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699088932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:06,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:06,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:10:06,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245573202] [2021-06-05 17:10:06,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:10:06,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:06,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:10:06,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:10:06,666 INFO L87 Difference]: Start difference. First operand 46789 states and 183032 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:08,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:08,001 INFO L93 Difference]: Finished difference Result 67704 states and 254569 transitions. [2021-06-05 17:10:08,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:10:08,001 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:10:08,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:08,184 INFO L225 Difference]: With dead ends: 67704 [2021-06-05 17:10:08,184 INFO L226 Difference]: Without dead ends: 67696 [2021-06-05 17:10:08,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 460.5ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 17:10:08,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67696 states. [2021-06-05 17:10:09,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67696 to 46721. [2021-06-05 17:10:09,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46721 states, 46720 states have (on average 3.913099315068493) internal successors, (182820), 46720 states have internal predecessors, (182820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:09,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46721 states to 46721 states and 182820 transitions. [2021-06-05 17:10:09,722 INFO L78 Accepts]: Start accepts. Automaton has 46721 states and 182820 transitions. Word has length 28 [2021-06-05 17:10:09,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:09,722 INFO L482 AbstractCegarLoop]: Abstraction has 46721 states and 182820 transitions. [2021-06-05 17:10:09,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:09,723 INFO L276 IsEmpty]: Start isEmpty. Operand 46721 states and 182820 transitions. [2021-06-05 17:10:09,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:10:09,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:09,791 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:09,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:09,991 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:09,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:09,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 151 times [2021-06-05 17:10:09,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:09,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913092207] [2021-06-05 17:10:09,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:10,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:10,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913092207] [2021-06-05 17:10:10,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913092207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:10,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006642067] [2021-06-05 17:10:10,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:10,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:10,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:10,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006642067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:10,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:10,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:10:10,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018023627] [2021-06-05 17:10:10,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:10:10,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:10,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:10:10,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:10:10,128 INFO L87 Difference]: Start difference. First operand 46721 states and 182820 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:11,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:11,155 INFO L93 Difference]: Finished difference Result 66435 states and 251058 transitions. [2021-06-05 17:10:11,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 17:10:11,156 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:10:11,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:11,329 INFO L225 Difference]: With dead ends: 66435 [2021-06-05 17:10:11,329 INFO L226 Difference]: Without dead ends: 66411 [2021-06-05 17:10:11,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 349.9ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:10:11,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66411 states. [2021-06-05 17:10:12,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66411 to 46697. [2021-06-05 17:10:12,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46697 states, 46696 states have (on average 3.9132259722460168) internal successors, (182732), 46696 states have internal predecessors, (182732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:13,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46697 states to 46697 states and 182732 transitions. [2021-06-05 17:10:13,048 INFO L78 Accepts]: Start accepts. Automaton has 46697 states and 182732 transitions. Word has length 28 [2021-06-05 17:10:13,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:13,048 INFO L482 AbstractCegarLoop]: Abstraction has 46697 states and 182732 transitions. [2021-06-05 17:10:13,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:13,048 INFO L276 IsEmpty]: Start isEmpty. Operand 46697 states and 182732 transitions. [2021-06-05 17:10:13,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:10:13,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:13,127 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:13,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:13,327 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:13,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:13,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1119483464, now seen corresponding path program 152 times [2021-06-05 17:10:13,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:13,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067256499] [2021-06-05 17:10:13,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:13,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:13,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067256499] [2021-06-05 17:10:13,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067256499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:13,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410753722] [2021-06-05 17:10:13,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:13,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:13,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:13,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:13,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:13,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410753722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:13,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:13,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:10:13,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575283111] [2021-06-05 17:10:13,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:10:13,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:13,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:10:13,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:10:13,466 INFO L87 Difference]: Start difference. First operand 46697 states and 182732 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:15,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:15,198 INFO L93 Difference]: Finished difference Result 69974 states and 261149 transitions. [2021-06-05 17:10:15,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 17:10:15,199 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:10:15,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:15,410 INFO L225 Difference]: With dead ends: 69974 [2021-06-05 17:10:15,410 INFO L226 Difference]: Without dead ends: 69974 [2021-06-05 17:10:15,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 838.3ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 17:10:15,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69974 states. [2021-06-05 17:10:16,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69974 to 51465. [2021-06-05 17:10:16,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51465 states, 51464 states have (on average 3.864293486709156) internal successors, (198872), 51464 states have internal predecessors, (198872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51465 states to 51465 states and 198872 transitions. [2021-06-05 17:10:17,078 INFO L78 Accepts]: Start accepts. Automaton has 51465 states and 198872 transitions. Word has length 28 [2021-06-05 17:10:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:17,079 INFO L482 AbstractCegarLoop]: Abstraction has 51465 states and 198872 transitions. [2021-06-05 17:10:17,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 51465 states and 198872 transitions. [2021-06-05 17:10:17,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:10:17,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:17,168 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:17,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-05 17:10:17,371 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:17,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:17,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1200859552, now seen corresponding path program 153 times [2021-06-05 17:10:17,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:17,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703790342] [2021-06-05 17:10:17,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:17,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:17,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703790342] [2021-06-05 17:10:17,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703790342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:17,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789153039] [2021-06-05 17:10:17,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:17,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:10:17,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:17,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:17,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:17,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789153039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:17,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:17,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:10:17,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609417998] [2021-06-05 17:10:17,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:10:17,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:17,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:10:17,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:10:17,489 INFO L87 Difference]: Start difference. First operand 51465 states and 198872 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:18,275 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 17:10:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:18,937 INFO L93 Difference]: Finished difference Result 69176 states and 258972 transitions. [2021-06-05 17:10:18,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 17:10:18,937 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:10:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:19,119 INFO L225 Difference]: With dead ends: 69176 [2021-06-05 17:10:19,119 INFO L226 Difference]: Without dead ends: 69168 [2021-06-05 17:10:19,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 825.2ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 17:10:19,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69168 states. [2021-06-05 17:10:20,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69168 to 50301. [2021-06-05 17:10:20,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50301 states, 50300 states have (on average 3.8816302186878726) internal successors, (195246), 50300 states have internal predecessors, (195246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:20,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50301 states to 50301 states and 195246 transitions. [2021-06-05 17:10:20,965 INFO L78 Accepts]: Start accepts. Automaton has 50301 states and 195246 transitions. Word has length 28 [2021-06-05 17:10:20,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:20,965 INFO L482 AbstractCegarLoop]: Abstraction has 50301 states and 195246 transitions. [2021-06-05 17:10:20,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:20,965 INFO L276 IsEmpty]: Start isEmpty. Operand 50301 states and 195246 transitions. [2021-06-05 17:10:21,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:10:21,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:21,056 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:21,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 17:10:21,256 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:21,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:21,256 INFO L82 PathProgramCache]: Analyzing trace with hash -314232420, now seen corresponding path program 154 times [2021-06-05 17:10:21,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:21,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356387348] [2021-06-05 17:10:21,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:21,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:21,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356387348] [2021-06-05 17:10:21,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356387348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:21,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797186952] [2021-06-05 17:10:21,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:21,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:10:21,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:21,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:21,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:21,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797186952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:21,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:21,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:10:21,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25638770] [2021-06-05 17:10:21,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:10:21,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:21,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:10:21,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:10:21,395 INFO L87 Difference]: Start difference. First operand 50301 states and 195246 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:22,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:22,548 INFO L93 Difference]: Finished difference Result 67372 states and 253976 transitions. [2021-06-05 17:10:22,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 17:10:22,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:10:22,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:22,724 INFO L225 Difference]: With dead ends: 67372 [2021-06-05 17:10:22,725 INFO L226 Difference]: Without dead ends: 67348 [2021-06-05 17:10:22,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 578.3ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 17:10:23,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67348 states. [2021-06-05 17:10:24,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67348 to 50281. [2021-06-05 17:10:24,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50281 states, 50280 states have (on average 3.879912490055688) internal successors, (195082), 50280 states have internal predecessors, (195082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:24,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50281 states to 50281 states and 195082 transitions. [2021-06-05 17:10:24,370 INFO L78 Accepts]: Start accepts. Automaton has 50281 states and 195082 transitions. Word has length 28 [2021-06-05 17:10:24,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:24,371 INFO L482 AbstractCegarLoop]: Abstraction has 50281 states and 195082 transitions. [2021-06-05 17:10:24,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:24,371 INFO L276 IsEmpty]: Start isEmpty. Operand 50281 states and 195082 transitions. [2021-06-05 17:10:24,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:10:24,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:24,453 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:24,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 17:10:24,654 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:24,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:24,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1316197732, now seen corresponding path program 155 times [2021-06-05 17:10:24,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:24,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959022291] [2021-06-05 17:10:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:24,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:24,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959022291] [2021-06-05 17:10:24,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959022291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:24,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400118902] [2021-06-05 17:10:24,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:24,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:10:24,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:24,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:24,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:24,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400118902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:24,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:24,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:10:24,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612192305] [2021-06-05 17:10:24,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:10:24,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:24,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:10:24,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:10:24,802 INFO L87 Difference]: Start difference. First operand 50281 states and 195082 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:26,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:26,120 INFO L93 Difference]: Finished difference Result 68744 states and 257789 transitions. [2021-06-05 17:10:26,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 17:10:26,120 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:10:26,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:26,296 INFO L225 Difference]: With dead ends: 68744 [2021-06-05 17:10:26,297 INFO L226 Difference]: Without dead ends: 68704 [2021-06-05 17:10:26,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 524.8ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:10:26,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68704 states. [2021-06-05 17:10:27,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68704 to 50435. [2021-06-05 17:10:27,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50435 states, 50434 states have (on average 3.879267954157909) internal successors, (195647), 50434 states have internal predecessors, (195647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:27,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50435 states to 50435 states and 195647 transitions. [2021-06-05 17:10:27,926 INFO L78 Accepts]: Start accepts. Automaton has 50435 states and 195647 transitions. Word has length 28 [2021-06-05 17:10:27,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:27,926 INFO L482 AbstractCegarLoop]: Abstraction has 50435 states and 195647 transitions. [2021-06-05 17:10:27,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:27,926 INFO L276 IsEmpty]: Start isEmpty. Operand 50435 states and 195647 transitions. [2021-06-05 17:10:28,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:10:28,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:28,002 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:28,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:28,203 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:28,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:28,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1262992088, now seen corresponding path program 156 times [2021-06-05 17:10:28,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:28,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204577707] [2021-06-05 17:10:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:28,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:28,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204577707] [2021-06-05 17:10:28,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204577707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:28,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761073280] [2021-06-05 17:10:28,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:28,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:10:28,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:28,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:28,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:28,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761073280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:28,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:28,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:10:28,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559804240] [2021-06-05 17:10:28,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:10:28,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:28,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:10:28,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:10:28,390 INFO L87 Difference]: Start difference. First operand 50435 states and 195647 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:30,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:30,100 INFO L93 Difference]: Finished difference Result 67858 states and 255155 transitions. [2021-06-05 17:10:30,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 17:10:30,100 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:10:30,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:30,302 INFO L225 Difference]: With dead ends: 67858 [2021-06-05 17:10:30,302 INFO L226 Difference]: Without dead ends: 67858 [2021-06-05 17:10:30,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 1068.9ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 17:10:30,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67858 states. [2021-06-05 17:10:31,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67858 to 51340. [2021-06-05 17:10:31,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51340 states, 51339 states have (on average 3.870702584779602) internal successors, (198718), 51339 states have internal predecessors, (198718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:32,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51340 states to 51340 states and 198718 transitions. [2021-06-05 17:10:32,179 INFO L78 Accepts]: Start accepts. Automaton has 51340 states and 198718 transitions. Word has length 28 [2021-06-05 17:10:32,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:32,179 INFO L482 AbstractCegarLoop]: Abstraction has 51340 states and 198718 transitions. [2021-06-05 17:10:32,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:32,179 INFO L276 IsEmpty]: Start isEmpty. Operand 51340 states and 198718 transitions. [2021-06-05 17:10:32,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:10:32,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:32,266 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:32,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-05 17:10:32,467 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:32,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:32,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936054, now seen corresponding path program 157 times [2021-06-05 17:10:32,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:32,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277593766] [2021-06-05 17:10:32,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:32,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:32,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277593766] [2021-06-05 17:10:32,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277593766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:32,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720372990] [2021-06-05 17:10:32,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:32,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:32,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:32,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720372990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:32,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:32,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:10:32,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227550298] [2021-06-05 17:10:32,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:10:32,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:32,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:10:32,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:10:32,627 INFO L87 Difference]: Start difference. First operand 51340 states and 198718 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:33,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:33,827 INFO L93 Difference]: Finished difference Result 67233 states and 253392 transitions. [2021-06-05 17:10:33,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 17:10:33,827 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:10:33,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:34,013 INFO L225 Difference]: With dead ends: 67233 [2021-06-05 17:10:34,014 INFO L226 Difference]: Without dead ends: 67225 [2021-06-05 17:10:34,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 627.3ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 17:10:34,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67225 states. [2021-06-05 17:10:35,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67225 to 51264. [2021-06-05 17:10:35,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51264 states, 51263 states have (on average 3.8718373875894896) internal successors, (198482), 51263 states have internal predecessors, (198482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:35,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51264 states to 51264 states and 198482 transitions. [2021-06-05 17:10:35,838 INFO L78 Accepts]: Start accepts. Automaton has 51264 states and 198482 transitions. Word has length 28 [2021-06-05 17:10:35,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:35,838 INFO L482 AbstractCegarLoop]: Abstraction has 51264 states and 198482 transitions. [2021-06-05 17:10:35,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:35,838 INFO L276 IsEmpty]: Start isEmpty. Operand 51264 states and 198482 transitions. [2021-06-05 17:10:35,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:10:35,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:35,917 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:36,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 17:10:36,118 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:36,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:36,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1638574064, now seen corresponding path program 158 times [2021-06-05 17:10:36,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:36,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342082305] [2021-06-05 17:10:36,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:36,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:36,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342082305] [2021-06-05 17:10:36,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342082305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:36,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46174090] [2021-06-05 17:10:36,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:36,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:36,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:36,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:36,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:36,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46174090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:36,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:36,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:10:36,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937579179] [2021-06-05 17:10:36,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:10:36,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:36,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:10:36,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:10:36,277 INFO L87 Difference]: Start difference. First operand 51264 states and 198482 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:37,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:37,375 INFO L93 Difference]: Finished difference Result 66710 states and 252146 transitions. [2021-06-05 17:10:37,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 17:10:37,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:10:37,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:37,840 INFO L225 Difference]: With dead ends: 66710 [2021-06-05 17:10:37,840 INFO L226 Difference]: Without dead ends: 66686 [2021-06-05 17:10:37,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 533.9ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 17:10:37,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66686 states. [2021-06-05 17:10:39,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66686 to 51250. [2021-06-05 17:10:39,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51250 states, 51249 states have (on average 3.8718218892075944) internal successors, (198427), 51249 states have internal predecessors, (198427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:39,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51250 states to 51250 states and 198427 transitions. [2021-06-05 17:10:39,360 INFO L78 Accepts]: Start accepts. Automaton has 51250 states and 198427 transitions. Word has length 28 [2021-06-05 17:10:39,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:39,360 INFO L482 AbstractCegarLoop]: Abstraction has 51250 states and 198427 transitions. [2021-06-05 17:10:39,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:39,360 INFO L276 IsEmpty]: Start isEmpty. Operand 51250 states and 198427 transitions. [2021-06-05 17:10:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:10:39,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:39,432 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:39,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-05 17:10:39,633 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:39,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:39,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1972807316, now seen corresponding path program 159 times [2021-06-05 17:10:39,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:39,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320184798] [2021-06-05 17:10:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:39,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:39,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320184798] [2021-06-05 17:10:39,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320184798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:39,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591857786] [2021-06-05 17:10:39,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:39,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:10:39,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:39,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:39,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:39,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591857786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:39,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:39,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 17:10:39,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057701100] [2021-06-05 17:10:39,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:10:39,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:39,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:10:39,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:10:39,801 INFO L87 Difference]: Start difference. First operand 51250 states and 198427 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:41,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:41,109 INFO L93 Difference]: Finished difference Result 66492 states and 251453 transitions. [2021-06-05 17:10:41,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 17:10:41,109 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:10:41,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:41,285 INFO L225 Difference]: With dead ends: 66492 [2021-06-05 17:10:41,285 INFO L226 Difference]: Without dead ends: 66452 [2021-06-05 17:10:41,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 489.5ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:10:41,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66452 states. [2021-06-05 17:10:42,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66452 to 51599. [2021-06-05 17:10:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51599 states, 51598 states have (on average 3.8733284235823096) internal successors, (199856), 51598 states have internal predecessors, (199856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:42,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51599 states to 51599 states and 199856 transitions. [2021-06-05 17:10:42,878 INFO L78 Accepts]: Start accepts. Automaton has 51599 states and 199856 transitions. Word has length 28 [2021-06-05 17:10:42,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:42,878 INFO L482 AbstractCegarLoop]: Abstraction has 51599 states and 199856 transitions. [2021-06-05 17:10:42,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:42,878 INFO L276 IsEmpty]: Start isEmpty. Operand 51599 states and 199856 transitions. [2021-06-05 17:10:42,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:10:42,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:42,949 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:43,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:43,150 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:43,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:43,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1825824890, now seen corresponding path program 160 times [2021-06-05 17:10:43,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:43,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377876543] [2021-06-05 17:10:43,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:43,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:43,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377876543] [2021-06-05 17:10:43,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377876543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:43,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976610307] [2021-06-05 17:10:43,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:43,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:10:43,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:43,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:43,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:43,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976610307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:43,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:43,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:10:43,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600731808] [2021-06-05 17:10:43,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:10:43,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:43,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:10:43,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:10:43,288 INFO L87 Difference]: Start difference. First operand 51599 states and 199856 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:44,141 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-05 17:10:44,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:44,699 INFO L93 Difference]: Finished difference Result 80755 states and 301894 transitions. [2021-06-05 17:10:44,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 17:10:44,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:10:44,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:44,910 INFO L225 Difference]: With dead ends: 80755 [2021-06-05 17:10:44,911 INFO L226 Difference]: Without dead ends: 80755 [2021-06-05 17:10:44,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 769.0ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 17:10:44,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80755 states. [2021-06-05 17:10:46,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80755 to 52765. [2021-06-05 17:10:46,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52765 states, 52764 states have (on average 3.885433249943143) internal successors, (205011), 52764 states have internal predecessors, (205011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52765 states to 52765 states and 205011 transitions. [2021-06-05 17:10:46,945 INFO L78 Accepts]: Start accepts. Automaton has 52765 states and 205011 transitions. Word has length 28 [2021-06-05 17:10:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:46,945 INFO L482 AbstractCegarLoop]: Abstraction has 52765 states and 205011 transitions. [2021-06-05 17:10:46,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 52765 states and 205011 transitions. [2021-06-05 17:10:47,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:10:47,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:47,047 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:47,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:47,248 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:47,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:47,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1151103012, now seen corresponding path program 161 times [2021-06-05 17:10:47,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:47,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778441195] [2021-06-05 17:10:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:47,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:47,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778441195] [2021-06-05 17:10:47,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778441195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:47,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479369216] [2021-06-05 17:10:47,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:47,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:10:47,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:47,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:47,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:47,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479369216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:47,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:47,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:10:47,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927742372] [2021-06-05 17:10:47,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:10:47,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:47,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:10:47,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:10:47,416 INFO L87 Difference]: Start difference. First operand 52765 states and 205011 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:48,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:48,549 INFO L93 Difference]: Finished difference Result 73770 states and 279838 transitions. [2021-06-05 17:10:48,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:10:48,549 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:10:48,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:48,753 INFO L225 Difference]: With dead ends: 73770 [2021-06-05 17:10:48,753 INFO L226 Difference]: Without dead ends: 73770 [2021-06-05 17:10:48,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 503.3ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:10:48,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73770 states. [2021-06-05 17:10:50,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73770 to 52795. [2021-06-05 17:10:50,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52795 states, 52794 states have (on average 3.8852521119824224) internal successors, (205118), 52794 states have internal predecessors, (205118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:50,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52795 states to 52795 states and 205118 transitions. [2021-06-05 17:10:50,510 INFO L78 Accepts]: Start accepts. Automaton has 52795 states and 205118 transitions. Word has length 28 [2021-06-05 17:10:50,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:50,510 INFO L482 AbstractCegarLoop]: Abstraction has 52795 states and 205118 transitions. [2021-06-05 17:10:50,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:50,510 INFO L276 IsEmpty]: Start isEmpty. Operand 52795 states and 205118 transitions. [2021-06-05 17:10:50,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:10:50,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:50,588 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:50,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:50,789 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:50,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:50,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1490504108, now seen corresponding path program 162 times [2021-06-05 17:10:50,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:50,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389961822] [2021-06-05 17:10:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:50,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:50,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389961822] [2021-06-05 17:10:50,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389961822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:50,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067012394] [2021-06-05 17:10:50,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:50,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:10:50,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:50,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:50,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:50,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067012394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:50,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:50,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:10:50,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146811940] [2021-06-05 17:10:50,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:10:50,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:50,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:10:50,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:10:50,940 INFO L87 Difference]: Start difference. First operand 52795 states and 205118 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:52,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:52,709 INFO L93 Difference]: Finished difference Result 74806 states and 282789 transitions. [2021-06-05 17:10:52,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 17:10:52,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:10:52,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:52,914 INFO L225 Difference]: With dead ends: 74806 [2021-06-05 17:10:52,915 INFO L226 Difference]: Without dead ends: 74806 [2021-06-05 17:10:52,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 851.0ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 17:10:52,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74806 states. [2021-06-05 17:10:54,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74806 to 53059. [2021-06-05 17:10:54,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53059 states, 53058 states have (on average 3.882091296317238) internal successors, (205976), 53058 states have internal predecessors, (205976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53059 states to 53059 states and 205976 transitions. [2021-06-05 17:10:54,644 INFO L78 Accepts]: Start accepts. Automaton has 53059 states and 205976 transitions. Word has length 28 [2021-06-05 17:10:54,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:54,644 INFO L482 AbstractCegarLoop]: Abstraction has 53059 states and 205976 transitions. [2021-06-05 17:10:54,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:54,645 INFO L276 IsEmpty]: Start isEmpty. Operand 53059 states and 205976 transitions. [2021-06-05 17:10:54,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:10:54,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:54,727 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:54,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 17:10:54,929 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:54,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:54,929 INFO L82 PathProgramCache]: Analyzing trace with hash 152535046, now seen corresponding path program 163 times [2021-06-05 17:10:54,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:54,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736355110] [2021-06-05 17:10:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:54,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:54,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736355110] [2021-06-05 17:10:54,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736355110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:54,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363922942] [2021-06-05 17:10:54,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:54,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:54,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:55,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363922942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:55,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:55,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:10:55,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935158981] [2021-06-05 17:10:55,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:10:55,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:55,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:10:55,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:10:55,072 INFO L87 Difference]: Start difference. First operand 53059 states and 205976 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:55,463 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 17:10:56,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:56,598 INFO L93 Difference]: Finished difference Result 73815 states and 279970 transitions. [2021-06-05 17:10:56,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 17:10:56,598 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:10:56,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:56,804 INFO L225 Difference]: With dead ends: 73815 [2021-06-05 17:10:56,804 INFO L226 Difference]: Without dead ends: 73811 [2021-06-05 17:10:56,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 880.5ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 17:10:56,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73811 states. [2021-06-05 17:10:58,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73811 to 52695. [2021-06-05 17:10:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52695 states, 52694 states have (on average 3.8854518541010363) internal successors, (204740), 52694 states have internal predecessors, (204740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52695 states to 52695 states and 204740 transitions. [2021-06-05 17:10:58,593 INFO L78 Accepts]: Start accepts. Automaton has 52695 states and 204740 transitions. Word has length 28 [2021-06-05 17:10:58,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:58,593 INFO L482 AbstractCegarLoop]: Abstraction has 52695 states and 204740 transitions. [2021-06-05 17:10:58,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:58,593 INFO L276 IsEmpty]: Start isEmpty. Operand 52695 states and 204740 transitions. [2021-06-05 17:10:58,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:10:58,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:58,673 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:58,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 17:10:58,873 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:58,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:58,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1936993134, now seen corresponding path program 164 times [2021-06-05 17:10:58,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:58,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778306609] [2021-06-05 17:10:58,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:58,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:58,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778306609] [2021-06-05 17:10:58,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778306609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:58,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263127713] [2021-06-05 17:10:58,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:58,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:58,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:58,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:58,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:59,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263127713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:59,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:59,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:10:59,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920143097] [2021-06-05 17:10:59,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:10:59,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:59,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:10:59,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:10:59,013 INFO L87 Difference]: Start difference. First operand 52695 states and 204740 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:59,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:59,879 INFO L93 Difference]: Finished difference Result 67805 states and 258963 transitions. [2021-06-05 17:10:59,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:10:59,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:10:59,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:00,076 INFO L225 Difference]: With dead ends: 67805 [2021-06-05 17:11:00,076 INFO L226 Difference]: Without dead ends: 67805 [2021-06-05 17:11:00,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 430.7ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 17:11:00,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67805 states. [2021-06-05 17:11:01,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67805 to 52711. [2021-06-05 17:11:01,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52711 states, 52710 states have (on average 3.887080250426864) internal successors, (204888), 52710 states have internal predecessors, (204888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:01,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52711 states to 52711 states and 204888 transitions. [2021-06-05 17:11:01,825 INFO L78 Accepts]: Start accepts. Automaton has 52711 states and 204888 transitions. Word has length 28 [2021-06-05 17:11:01,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:01,825 INFO L482 AbstractCegarLoop]: Abstraction has 52711 states and 204888 transitions. [2021-06-05 17:11:01,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:01,825 INFO L276 IsEmpty]: Start isEmpty. Operand 52711 states and 204888 transitions. [2021-06-05 17:11:01,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:11:01,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:01,899 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:02,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-05 17:11:02,100 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:02,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:02,100 INFO L82 PathProgramCache]: Analyzing trace with hash -756673454, now seen corresponding path program 165 times [2021-06-05 17:11:02,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:02,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896212394] [2021-06-05 17:11:02,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:02,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:02,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896212394] [2021-06-05 17:11:02,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896212394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:02,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907336246] [2021-06-05 17:11:02,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:02,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:11:02,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:02,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:11:02,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:02,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907336246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:02,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:02,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:11:02,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339355185] [2021-06-05 17:11:02,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:11:02,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:02,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:11:02,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:11:02,232 INFO L87 Difference]: Start difference. First operand 52711 states and 204888 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:02,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:02,995 INFO L93 Difference]: Finished difference Result 66995 states and 256734 transitions. [2021-06-05 17:11:02,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:11:02,995 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:11:02,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:03,185 INFO L225 Difference]: With dead ends: 66995 [2021-06-05 17:11:03,185 INFO L226 Difference]: Without dead ends: 66983 [2021-06-05 17:11:03,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 323.3ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:11:03,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66983 states. [2021-06-05 17:11:04,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66983 to 52645. [2021-06-05 17:11:04,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52645 states, 52644 states have (on average 3.8880974090114733) internal successors, (204685), 52644 states have internal predecessors, (204685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:04,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52645 states to 52645 states and 204685 transitions. [2021-06-05 17:11:04,983 INFO L78 Accepts]: Start accepts. Automaton has 52645 states and 204685 transitions. Word has length 28 [2021-06-05 17:11:04,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:04,983 INFO L482 AbstractCegarLoop]: Abstraction has 52645 states and 204685 transitions. [2021-06-05 17:11:04,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:04,983 INFO L276 IsEmpty]: Start isEmpty. Operand 52645 states and 204685 transitions. [2021-06-05 17:11:05,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:11:05,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:05,089 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:05,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 17:11:05,305 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:05,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:05,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1537074702, now seen corresponding path program 166 times [2021-06-05 17:11:05,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:05,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906133079] [2021-06-05 17:11:05,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:05,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:05,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906133079] [2021-06-05 17:11:05,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906133079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:05,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247437720] [2021-06-05 17:11:05,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:05,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:11:05,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:05,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:11:05,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:05,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247437720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:05,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:05,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:11:05,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321186265] [2021-06-05 17:11:05,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:11:05,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:05,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:11:05,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:11:05,447 INFO L87 Difference]: Start difference. First operand 52645 states and 204685 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:06,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:06,121 INFO L93 Difference]: Finished difference Result 57259 states and 219875 transitions. [2021-06-05 17:11:06,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 17:11:06,122 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:11:06,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:06,285 INFO L225 Difference]: With dead ends: 57259 [2021-06-05 17:11:06,285 INFO L226 Difference]: Without dead ends: 57259 [2021-06-05 17:11:06,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 292.9ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:11:06,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57259 states. [2021-06-05 17:11:07,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57259 to 52853. [2021-06-05 17:11:07,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52853 states, 52852 states have (on average 3.8858888972981154) internal successors, (205377), 52852 states have internal predecessors, (205377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52853 states to 52853 states and 205377 transitions. [2021-06-05 17:11:08,004 INFO L78 Accepts]: Start accepts. Automaton has 52853 states and 205377 transitions. Word has length 28 [2021-06-05 17:11:08,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:08,004 INFO L482 AbstractCegarLoop]: Abstraction has 52853 states and 205377 transitions. [2021-06-05 17:11:08,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:08,004 INFO L276 IsEmpty]: Start isEmpty. Operand 52853 states and 205377 transitions. [2021-06-05 17:11:08,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:11:08,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:08,096 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:08,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-06-05 17:11:08,297 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:08,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:08,297 INFO L82 PathProgramCache]: Analyzing trace with hash 538506736, now seen corresponding path program 167 times [2021-06-05 17:11:08,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:08,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234757062] [2021-06-05 17:11:08,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:08,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:08,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234757062] [2021-06-05 17:11:08,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234757062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:08,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678364233] [2021-06-05 17:11:08,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:08,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:11:08,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:08,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:11:08,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:08,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678364233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:08,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:08,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:11:08,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918336062] [2021-06-05 17:11:08,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:11:08,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:08,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:11:08,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:11:08,426 INFO L87 Difference]: Start difference. First operand 52853 states and 205377 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:08,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:08,998 INFO L93 Difference]: Finished difference Result 57070 states and 219367 transitions. [2021-06-05 17:11:08,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:11:08,999 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:11:08,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:09,163 INFO L225 Difference]: With dead ends: 57070 [2021-06-05 17:11:09,163 INFO L226 Difference]: Without dead ends: 57066 [2021-06-05 17:11:09,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:11:09,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57066 states. [2021-06-05 17:11:10,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57066 to 52793. [2021-06-05 17:11:10,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52793 states, 52792 states have (on average 3.886668434611305) internal successors, (205185), 52792 states have internal predecessors, (205185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:10,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52793 states to 52793 states and 205185 transitions. [2021-06-05 17:11:10,578 INFO L78 Accepts]: Start accepts. Automaton has 52793 states and 205185 transitions. Word has length 28 [2021-06-05 17:11:10,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:10,578 INFO L482 AbstractCegarLoop]: Abstraction has 52793 states and 205185 transitions. [2021-06-05 17:11:10,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:10,578 INFO L276 IsEmpty]: Start isEmpty. Operand 52793 states and 205185 transitions. [2021-06-05 17:11:10,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:11:10,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:10,899 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:11,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:11,113 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:11,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:11,113 INFO L82 PathProgramCache]: Analyzing trace with hash 508703680, now seen corresponding path program 87 times [2021-06-05 17:11:11,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:11,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748097072] [2021-06-05 17:11:11,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:11,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:11,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:11,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748097072] [2021-06-05 17:11:11,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748097072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:11,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203935584] [2021-06-05 17:11:11,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:11,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:11:11,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:11,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:11:11,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:11,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203935584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:11,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:11,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 17:11:11,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826888616] [2021-06-05 17:11:11,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:11:11,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:11,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:11:11,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:11:11,220 INFO L87 Difference]: Start difference. First operand 52793 states and 205185 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:11,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:11,806 INFO L93 Difference]: Finished difference Result 57147 states and 219589 transitions. [2021-06-05 17:11:11,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:11:11,807 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:11:11,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:11,951 INFO L225 Difference]: With dead ends: 57147 [2021-06-05 17:11:11,951 INFO L226 Difference]: Without dead ends: 57147 [2021-06-05 17:11:11,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:11:12,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57147 states. [2021-06-05 17:11:13,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57147 to 52913. [2021-06-05 17:11:13,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52913 states, 52912 states have (on average 3.8848087390384034) internal successors, (205553), 52912 states have internal predecessors, (205553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:13,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52913 states to 52913 states and 205553 transitions. [2021-06-05 17:11:13,329 INFO L78 Accepts]: Start accepts. Automaton has 52913 states and 205553 transitions. Word has length 28 [2021-06-05 17:11:13,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:13,330 INFO L482 AbstractCegarLoop]: Abstraction has 52913 states and 205553 transitions. [2021-06-05 17:11:13,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:13,330 INFO L276 IsEmpty]: Start isEmpty. Operand 52913 states and 205553 transitions. [2021-06-05 17:11:13,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:11:13,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:13,417 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:13,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-05 17:11:13,634 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:13,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:13,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1414052632, now seen corresponding path program 88 times [2021-06-05 17:11:13,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:13,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339933757] [2021-06-05 17:11:13,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:11:13,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:13,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339933757] [2021-06-05 17:11:13,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339933757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:13,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63453688] [2021-06-05 17:11:13,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:13,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:11:13,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:13,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:11:13,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:11:13,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63453688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:13,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:13,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 17:11:13,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839988738] [2021-06-05 17:11:13,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:11:13,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:13,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:11:13,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:11:13,732 INFO L87 Difference]: Start difference. First operand 52913 states and 205553 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:14,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:14,378 INFO L93 Difference]: Finished difference Result 57331 states and 220238 transitions. [2021-06-05 17:11:14,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:11:14,378 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:11:14,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:14,536 INFO L225 Difference]: With dead ends: 57331 [2021-06-05 17:11:14,536 INFO L226 Difference]: Without dead ends: 57319 [2021-06-05 17:11:14,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:11:14,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57319 states. [2021-06-05 17:11:15,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57319 to 53047. [2021-06-05 17:11:15,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53047 states, 53046 states have (on average 3.883195716924933) internal successors, (205988), 53046 states have internal predecessors, (205988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:15,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53047 states to 53047 states and 205988 transitions. [2021-06-05 17:11:15,959 INFO L78 Accepts]: Start accepts. Automaton has 53047 states and 205988 transitions. Word has length 28 [2021-06-05 17:11:15,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:15,960 INFO L482 AbstractCegarLoop]: Abstraction has 53047 states and 205988 transitions. [2021-06-05 17:11:15,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:15,960 INFO L276 IsEmpty]: Start isEmpty. Operand 53047 states and 205988 transitions. [2021-06-05 17:11:16,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:11:16,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:16,046 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:16,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:16,246 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:16,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:16,247 INFO L82 PathProgramCache]: Analyzing trace with hash 421559068, now seen corresponding path program 89 times [2021-06-05 17:11:16,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:16,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486560968] [2021-06-05 17:11:16,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:16,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:16,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486560968] [2021-06-05 17:11:16,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486560968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:16,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650258529] [2021-06-05 17:11:16,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:16,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:11:16,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:16,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:11:16,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:16,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650258529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:16,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:16,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 17:11:16,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007520952] [2021-06-05 17:11:16,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:11:16,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:16,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:11:16,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:11:16,347 INFO L87 Difference]: Start difference. First operand 53047 states and 205988 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:16,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:16,865 INFO L93 Difference]: Finished difference Result 57295 states and 220154 transitions. [2021-06-05 17:11:16,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:11:16,865 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:11:16,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:17,337 INFO L225 Difference]: With dead ends: 57295 [2021-06-05 17:11:17,338 INFO L226 Difference]: Without dead ends: 57275 [2021-06-05 17:11:17,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-05 17:11:17,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57275 states. [2021-06-05 17:11:18,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57275 to 53047. [2021-06-05 17:11:18,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53047 states, 53046 states have (on average 3.883120310673755) internal successors, (205984), 53046 states have internal predecessors, (205984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:18,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53047 states to 53047 states and 205984 transitions. [2021-06-05 17:11:18,711 INFO L78 Accepts]: Start accepts. Automaton has 53047 states and 205984 transitions. Word has length 28 [2021-06-05 17:11:18,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:18,711 INFO L482 AbstractCegarLoop]: Abstraction has 53047 states and 205984 transitions. [2021-06-05 17:11:18,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:18,711 INFO L276 IsEmpty]: Start isEmpty. Operand 53047 states and 205984 transitions. [2021-06-05 17:11:18,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:11:18,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:18,794 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:18,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-05 17:11:18,995 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:18,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:18,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1989119940, now seen corresponding path program 168 times [2021-06-05 17:11:18,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:18,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416916469] [2021-06-05 17:11:18,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:19,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:19,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416916469] [2021-06-05 17:11:19,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416916469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:19,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104337113] [2021-06-05 17:11:19,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:19,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:11:19,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:19,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:11:19,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:19,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104337113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:19,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:19,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:11:19,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841583693] [2021-06-05 17:11:19,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:11:19,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:19,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:11:19,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:11:19,107 INFO L87 Difference]: Start difference. First operand 53047 states and 205984 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:19,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:19,611 INFO L93 Difference]: Finished difference Result 58008 states and 223549 transitions. [2021-06-05 17:11:19,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:11:19,611 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:11:19,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:19,778 INFO L225 Difference]: With dead ends: 58008 [2021-06-05 17:11:19,778 INFO L226 Difference]: Without dead ends: 57995 [2021-06-05 17:11:19,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:11:19,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57995 states. [2021-06-05 17:11:20,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57995 to 55780. [2021-06-05 17:11:21,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55780 states, 55779 states have (on average 3.8898510192007745) internal successors, (216972), 55779 states have internal predecessors, (216972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:21,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55780 states to 55780 states and 216972 transitions. [2021-06-05 17:11:21,514 INFO L78 Accepts]: Start accepts. Automaton has 55780 states and 216972 transitions. Word has length 28 [2021-06-05 17:11:21,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:21,514 INFO L482 AbstractCegarLoop]: Abstraction has 55780 states and 216972 transitions. [2021-06-05 17:11:21,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 55780 states and 216972 transitions. [2021-06-05 17:11:21,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:11:21,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:21,658 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:21,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:21,858 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:21,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:21,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1306375610, now seen corresponding path program 169 times [2021-06-05 17:11:21,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:21,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642296095] [2021-06-05 17:11:21,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:21,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:21,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642296095] [2021-06-05 17:11:21,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642296095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:21,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102485106] [2021-06-05 17:11:21,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:21,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:11:21,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:21,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102485106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:21,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:21,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:11:21,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201306252] [2021-06-05 17:11:21,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:11:21,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:21,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:11:21,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:11:21,970 INFO L87 Difference]: Start difference. First operand 55780 states and 216972 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:22,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:22,490 INFO L93 Difference]: Finished difference Result 61738 states and 236391 transitions. [2021-06-05 17:11:22,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:11:22,490 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:11:22,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:22,656 INFO L225 Difference]: With dead ends: 61738 [2021-06-05 17:11:22,656 INFO L226 Difference]: Without dead ends: 61738 [2021-06-05 17:11:22,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:11:22,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61738 states. [2021-06-05 17:11:23,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61738 to 49367. [2021-06-05 17:11:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49367 states, 49366 states have (on average 3.878924766033302) internal successors, (191487), 49366 states have internal predecessors, (191487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:24,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49367 states to 49367 states and 191487 transitions. [2021-06-05 17:11:24,023 INFO L78 Accepts]: Start accepts. Automaton has 49367 states and 191487 transitions. Word has length 28 [2021-06-05 17:11:24,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:24,023 INFO L482 AbstractCegarLoop]: Abstraction has 49367 states and 191487 transitions. [2021-06-05 17:11:24,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:24,023 INFO L276 IsEmpty]: Start isEmpty. Operand 49367 states and 191487 transitions. [2021-06-05 17:11:24,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:11:24,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:24,099 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:24,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:24,300 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:24,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:24,300 INFO L82 PathProgramCache]: Analyzing trace with hash 986257146, now seen corresponding path program 170 times [2021-06-05 17:11:24,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:24,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8335931] [2021-06-05 17:11:24,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:24,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:24,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8335931] [2021-06-05 17:11:24,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8335931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:24,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408705800] [2021-06-05 17:11:24,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:24,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:11:24,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:24,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:11:24,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:24,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408705800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:24,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:24,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:11:24,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408446299] [2021-06-05 17:11:24,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:11:24,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:24,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:11:24,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:11:24,413 INFO L87 Difference]: Start difference. First operand 49367 states and 191487 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:25,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:25,186 INFO L93 Difference]: Finished difference Result 54325 states and 208211 transitions. [2021-06-05 17:11:25,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:11:25,187 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:11:25,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:25,327 INFO L225 Difference]: With dead ends: 54325 [2021-06-05 17:11:25,328 INFO L226 Difference]: Without dead ends: 54325 [2021-06-05 17:11:25,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-05 17:11:25,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54325 states. [2021-06-05 17:11:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54325 to 50200. [2021-06-05 17:11:26,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50200 states, 50199 states have (on average 3.8774676786390168) internal successors, (194645), 50199 states have internal predecessors, (194645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:26,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50200 states to 50200 states and 194645 transitions. [2021-06-05 17:11:26,621 INFO L78 Accepts]: Start accepts. Automaton has 50200 states and 194645 transitions. Word has length 28 [2021-06-05 17:11:26,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:26,622 INFO L482 AbstractCegarLoop]: Abstraction has 50200 states and 194645 transitions. [2021-06-05 17:11:26,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:26,622 INFO L276 IsEmpty]: Start isEmpty. Operand 50200 states and 194645 transitions. [2021-06-05 17:11:26,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:11:26,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:26,696 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:26,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:26,897 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:26,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:26,897 INFO L82 PathProgramCache]: Analyzing trace with hash -22913030, now seen corresponding path program 171 times [2021-06-05 17:11:26,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:26,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088772855] [2021-06-05 17:11:26,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:26,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:26,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088772855] [2021-06-05 17:11:26,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088772855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:26,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763689894] [2021-06-05 17:11:26,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:26,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:11:26,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:26,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:11:26,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:27,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763689894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:27,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:27,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 17:11:27,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119106139] [2021-06-05 17:11:27,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:11:27,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:27,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:11:27,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:11:27,010 INFO L87 Difference]: Start difference. First operand 50200 states and 194645 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:27,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:27,460 INFO L93 Difference]: Finished difference Result 52033 states and 200786 transitions. [2021-06-05 17:11:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:11:27,460 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:11:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:27,605 INFO L225 Difference]: With dead ends: 52033 [2021-06-05 17:11:27,605 INFO L226 Difference]: Without dead ends: 52033 [2021-06-05 17:11:27,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:11:27,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52033 states. [2021-06-05 17:11:28,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52033 to 50208. [2021-06-05 17:11:28,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50208 states, 50207 states have (on average 3.8773278626486345) internal successors, (194669), 50207 states have internal predecessors, (194669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:28,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50208 states to 50208 states and 194669 transitions. [2021-06-05 17:11:28,936 INFO L78 Accepts]: Start accepts. Automaton has 50208 states and 194669 transitions. Word has length 28 [2021-06-05 17:11:28,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:28,936 INFO L482 AbstractCegarLoop]: Abstraction has 50208 states and 194669 transitions. [2021-06-05 17:11:28,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:28,936 INFO L276 IsEmpty]: Start isEmpty. Operand 50208 states and 194669 transitions. [2021-06-05 17:11:29,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:11:29,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:29,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forcibly destroying the process [2021-06-05 17:11:29,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 17:11:29,301 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:29,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:29,302 INFO L82 PathProgramCache]: Analyzing trace with hash -120181494, now seen corresponding path program 172 times [2021-06-05 17:11:29,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:29,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433507719] [2021-06-05 17:11:29,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] The stream was forcibly closed: stdIn [2021-06-05 17:11:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:29,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:29,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433507719] [2021-06-05 17:11:29,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433507719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:29,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753738286] [2021-06-05 17:11:29,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:29,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:11:29,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:29,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:11:29,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:29,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753738286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:29,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:29,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 17:11:29,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427845295] [2021-06-05 17:11:29,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:11:29,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:29,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:11:29,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:11:29,428 INFO L87 Difference]: Start difference. First operand 50208 states and 194669 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:29,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:29,889 INFO L93 Difference]: Finished difference Result 51753 states and 199864 transitions. [2021-06-05 17:11:29,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:11:29,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 17:11:29,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:30,039 INFO L225 Difference]: With dead ends: 51753 [2021-06-05 17:11:30,039 INFO L226 Difference]: Without dead ends: 51753 [2021-06-05 17:11:30,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:11:30,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51753 states. [2021-06-05 17:11:31,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51753 to 50102. [2021-06-05 17:11:31,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50102 states, 50101 states have (on average 3.877068321989581) internal successors, (194245), 50101 states have internal predecessors, (194245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:31,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50102 states to 50102 states and 194245 transitions. [2021-06-05 17:11:31,319 INFO L78 Accepts]: Start accepts. Automaton has 50102 states and 194245 transitions. Word has length 28 [2021-06-05 17:11:31,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:31,319 INFO L482 AbstractCegarLoop]: Abstraction has 50102 states and 194245 transitions. [2021-06-05 17:11:31,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:31,319 INFO L276 IsEmpty]: Start isEmpty. Operand 50102 states and 194245 transitions. [2021-06-05 17:11:31,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:11:31,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:31,398 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:31,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable454,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:31,598 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:31,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:31,598 INFO L82 PathProgramCache]: Analyzing trace with hash -915745990, now seen corresponding path program 173 times [2021-06-05 17:11:31,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:31,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653740158] [2021-06-05 17:11:31,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:31,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:31,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653740158] [2021-06-05 17:11:31,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653740158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:31,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852469466] [2021-06-05 17:11:31,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:31,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:11:31,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:31,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 17:11:31,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:32,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:11:32,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:32,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:32,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 17:11:32,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:11:32,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:11:32,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:11:32,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:5 [2021-06-05 17:11:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:32,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852469466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:32,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:32,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:11:32,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792554360] [2021-06-05 17:11:32,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:11:32,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:32,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:11:32,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:11:32,142 INFO L87 Difference]: Start difference. First operand 50102 states and 194245 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:32,902 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-05 17:11:35,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:35,283 INFO L93 Difference]: Finished difference Result 58226 states and 218118 transitions. [2021-06-05 17:11:35,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 17:11:35,283 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:11:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:35,443 INFO L225 Difference]: With dead ends: 58226 [2021-06-05 17:11:35,443 INFO L226 Difference]: Without dead ends: 58196 [2021-06-05 17:11:35,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 2541.3ms TimeCoverageRelationStatistics Valid=432, Invalid=2430, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:11:35,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58196 states. [2021-06-05 17:11:36,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58196 to 50237. [2021-06-05 17:11:36,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50237 states, 50236 states have (on average 3.876303845847599) internal successors, (194730), 50236 states have internal predecessors, (194730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:36,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50237 states to 50237 states and 194730 transitions. [2021-06-05 17:11:36,915 INFO L78 Accepts]: Start accepts. Automaton has 50237 states and 194730 transitions. Word has length 30 [2021-06-05 17:11:36,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:36,915 INFO L482 AbstractCegarLoop]: Abstraction has 50237 states and 194730 transitions. [2021-06-05 17:11:36,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:36,915 INFO L276 IsEmpty]: Start isEmpty. Operand 50237 states and 194730 transitions. [2021-06-05 17:11:37,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:11:37,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:37,001 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:37,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-05 17:11:37,202 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:37,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:37,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1350823290, now seen corresponding path program 174 times [2021-06-05 17:11:37,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:37,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873980480] [2021-06-05 17:11:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:37,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:37,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873980480] [2021-06-05 17:11:37,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873980480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:37,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698792340] [2021-06-05 17:11:37,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:37,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:11:37,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:37,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:11:37,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:37,676 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-05 17:11:37,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-06-05 17:11:37,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:11:37,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:11:37,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:11:37,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-05 17:11:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:37,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698792340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:37,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:37,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:11:37,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966681280] [2021-06-05 17:11:37,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:11:37,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:37,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:11:37,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:11:37,700 INFO L87 Difference]: Start difference. First operand 50237 states and 194730 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:40,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:40,002 INFO L93 Difference]: Finished difference Result 58234 states and 218176 transitions. [2021-06-05 17:11:40,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 17:11:40,002 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:11:40,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:40,161 INFO L225 Difference]: With dead ends: 58234 [2021-06-05 17:11:40,161 INFO L226 Difference]: Without dead ends: 58204 [2021-06-05 17:11:40,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1692.3ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:11:40,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58204 states. [2021-06-05 17:11:41,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58204 to 50243. [2021-06-05 17:11:41,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50243 states, 50242 states have (on average 3.8763385215556707) internal successors, (194755), 50242 states have internal predecessors, (194755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50243 states to 50243 states and 194755 transitions. [2021-06-05 17:11:41,373 INFO L78 Accepts]: Start accepts. Automaton has 50243 states and 194755 transitions. Word has length 30 [2021-06-05 17:11:41,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:41,374 INFO L482 AbstractCegarLoop]: Abstraction has 50243 states and 194755 transitions. [2021-06-05 17:11:41,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:41,374 INFO L276 IsEmpty]: Start isEmpty. Operand 50243 states and 194755 transitions. [2021-06-05 17:11:41,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:11:41,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:41,458 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:41,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-05 17:11:41,659 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:41,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:41,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1352714698, now seen corresponding path program 175 times [2021-06-05 17:11:41,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:41,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103981525] [2021-06-05 17:11:41,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:41,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:41,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103981525] [2021-06-05 17:11:41,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103981525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:41,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845860205] [2021-06-05 17:11:41,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:41,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:11:41,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:42,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:42,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:42,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:42,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:11:42,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:42,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:11:42,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 17:11:42,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:11:42,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:11:42,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:11:42,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 17:11:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:42,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845860205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:42,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:42,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 17:11:42,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82106812] [2021-06-05 17:11:42,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:11:42,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:42,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:11:42,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:11:42,155 INFO L87 Difference]: Start difference. First operand 50243 states and 194755 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:43,587 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-05 17:11:45,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:45,707 INFO L93 Difference]: Finished difference Result 71226 states and 266663 transitions. [2021-06-05 17:11:45,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 17:11:45,707 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:11:45,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:45,897 INFO L225 Difference]: With dead ends: 71226 [2021-06-05 17:11:45,897 INFO L226 Difference]: Without dead ends: 71211 [2021-06-05 17:11:45,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 2960.7ms TimeCoverageRelationStatistics Valid=489, Invalid=3171, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 17:11:46,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71211 states. [2021-06-05 17:11:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71211 to 50282. [2021-06-05 17:11:47,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50282 states, 50281 states have (on average 3.8760764503490384) internal successors, (194893), 50281 states have internal predecessors, (194893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:47,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50282 states to 50282 states and 194893 transitions. [2021-06-05 17:11:47,382 INFO L78 Accepts]: Start accepts. Automaton has 50282 states and 194893 transitions. Word has length 30 [2021-06-05 17:11:47,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:47,382 INFO L482 AbstractCegarLoop]: Abstraction has 50282 states and 194893 transitions. [2021-06-05 17:11:47,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:47,382 INFO L276 IsEmpty]: Start isEmpty. Operand 50282 states and 194893 transitions. [2021-06-05 17:11:47,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:11:47,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:47,471 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:47,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:47,671 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:47,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:47,672 INFO L82 PathProgramCache]: Analyzing trace with hash -547667522, now seen corresponding path program 176 times [2021-06-05 17:11:47,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:47,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705796847] [2021-06-05 17:11:47,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:47,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:47,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705796847] [2021-06-05 17:11:47,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705796847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:47,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090990442] [2021-06-05 17:11:47,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:47,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:11:47,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:47,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:11:47,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:48,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:11:48,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 17:11:48,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:11:48,210 INFO L628 ElimStorePlain]: treesize reduction 51, result has 46.9 percent of original size [2021-06-05 17:11:48,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 17:11:48,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:108 [2021-06-05 17:11:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:48,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090990442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:48,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:48,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 17:11:48,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69007018] [2021-06-05 17:11:48,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:11:48,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:48,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:11:48,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:11:48,311 INFO L87 Difference]: Start difference. First operand 50282 states and 194893 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:49,343 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-06-05 17:11:49,883 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-06-05 17:11:50,555 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-05 17:11:51,098 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 17:11:52,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:52,270 INFO L93 Difference]: Finished difference Result 60601 states and 225495 transitions. [2021-06-05 17:11:52,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:11:52,270 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:11:52,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:52,438 INFO L225 Difference]: With dead ends: 60601 [2021-06-05 17:11:52,438 INFO L226 Difference]: Without dead ends: 60571 [2021-06-05 17:11:52,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 3365.1ms TimeCoverageRelationStatistics Valid=665, Invalid=3757, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 17:11:52,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60571 states. [2021-06-05 17:11:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60571 to 50303. [2021-06-05 17:11:53,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50303 states, 50302 states have (on average 3.8758697467297525) internal successors, (194964), 50302 states have internal predecessors, (194964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:53,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50303 states to 50303 states and 194964 transitions. [2021-06-05 17:11:53,861 INFO L78 Accepts]: Start accepts. Automaton has 50303 states and 194964 transitions. Word has length 30 [2021-06-05 17:11:53,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:53,861 INFO L482 AbstractCegarLoop]: Abstraction has 50303 states and 194964 transitions. [2021-06-05 17:11:53,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:53,861 INFO L276 IsEmpty]: Start isEmpty. Operand 50303 states and 194964 transitions. [2021-06-05 17:11:53,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:11:53,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:53,941 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:54,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-05 17:11:54,141 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:54,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:54,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1002714042, now seen corresponding path program 177 times [2021-06-05 17:11:54,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:54,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105902060] [2021-06-05 17:11:54,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:54,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:54,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105902060] [2021-06-05 17:11:54,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105902060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:54,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174658932] [2021-06-05 17:11:54,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:54,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:11:54,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:54,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 17:11:54,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:54,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:54,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:54,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:11:54,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 59 [2021-06-05 17:11:54,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:11:54,707 INFO L628 ElimStorePlain]: treesize reduction 73, result has 25.5 percent of original size [2021-06-05 17:11:54,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:11:54,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:37 [2021-06-05 17:11:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:54,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174658932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:54,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:54,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:11:54,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277869580] [2021-06-05 17:11:54,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:11:54,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:54,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:11:54,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:11:54,768 INFO L87 Difference]: Start difference. First operand 50303 states and 194964 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:56,119 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-06-05 17:11:56,354 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 17:11:56,659 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-06-05 17:11:57,136 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-06-05 17:11:57,434 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-05 17:11:57,620 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 17:11:57,834 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-05 17:11:58,160 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-05 17:11:59,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:59,633 INFO L93 Difference]: Finished difference Result 79320 states and 295712 transitions. [2021-06-05 17:11:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 17:11:59,633 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:11:59,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:59,839 INFO L225 Difference]: With dead ends: 79320 [2021-06-05 17:11:59,839 INFO L226 Difference]: Without dead ends: 79290 [2021-06-05 17:11:59,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 3905.5ms TimeCoverageRelationStatistics Valid=667, Invalid=5033, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 17:11:59,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79290 states. [2021-06-05 17:12:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79290 to 50315. [2021-06-05 17:12:01,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50315 states, 50314 states have (on average 3.8759391024366976) internal successors, (195014), 50314 states have internal predecessors, (195014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:01,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50315 states to 50315 states and 195014 transitions. [2021-06-05 17:12:01,187 INFO L78 Accepts]: Start accepts. Automaton has 50315 states and 195014 transitions. Word has length 30 [2021-06-05 17:12:01,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:01,187 INFO L482 AbstractCegarLoop]: Abstraction has 50315 states and 195014 transitions. [2021-06-05 17:12:01,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:01,187 INFO L276 IsEmpty]: Start isEmpty. Operand 50315 states and 195014 transitions. [2021-06-05 17:12:01,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:12:01,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:01,272 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:12:01,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:01,473 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:01,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:01,473 INFO L82 PathProgramCache]: Analyzing trace with hash 2016530042, now seen corresponding path program 178 times [2021-06-05 17:12:01,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:01,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519683452] [2021-06-05 17:12:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:01,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:01,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519683452] [2021-06-05 17:12:01,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519683452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:01,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879030116] [2021-06-05 17:12:01,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:01,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:12:01,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:01,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:12:01,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:01,954 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-05 17:12:01,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-06-05 17:12:01,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:12:01,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:12:01,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:12:01,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-05 17:12:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:01,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879030116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:01,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:01,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:12:01,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339021336] [2021-06-05 17:12:01,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:12:01,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:01,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:12:01,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:12:01,978 INFO L87 Difference]: Start difference. First operand 50315 states and 195014 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:03,329 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-06-05 17:12:04,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:04,686 INFO L93 Difference]: Finished difference Result 61699 states and 228811 transitions. [2021-06-05 17:12:04,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 17:12:04,687 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:12:04,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:04,854 INFO L225 Difference]: With dead ends: 61699 [2021-06-05 17:12:04,854 INFO L226 Difference]: Without dead ends: 61624 [2021-06-05 17:12:04,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 2273.0ms TimeCoverageRelationStatistics Valid=551, Invalid=2419, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 17:12:04,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61624 states. [2021-06-05 17:12:06,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61624 to 50371. [2021-06-05 17:12:06,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50371 states, 50370 states have (on average 3.8753027595791147) internal successors, (195199), 50370 states have internal predecessors, (195199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:06,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50371 states to 50371 states and 195199 transitions. [2021-06-05 17:12:06,244 INFO L78 Accepts]: Start accepts. Automaton has 50371 states and 195199 transitions. Word has length 30 [2021-06-05 17:12:06,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:06,244 INFO L482 AbstractCegarLoop]: Abstraction has 50371 states and 195199 transitions. [2021-06-05 17:12:06,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:06,244 INFO L276 IsEmpty]: Start isEmpty. Operand 50371 states and 195199 transitions. [2021-06-05 17:12:06,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:12:06,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:06,328 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:12:06,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 17:12:06,528 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:06,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:06,529 INFO L82 PathProgramCache]: Analyzing trace with hash -728055690, now seen corresponding path program 179 times [2021-06-05 17:12:06,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:06,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712508963] [2021-06-05 17:12:06,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:06,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:06,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712508963] [2021-06-05 17:12:06,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712508963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:06,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387020499] [2021-06-05 17:12:06,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:06,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:12:06,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:06,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 17:12:06,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:07,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:07,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:07,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:07,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:07,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:07,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:07,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:07,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 17:12:07,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:12:07,341 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.9 percent of original size [2021-06-05 17:12:07,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:12:07,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:5 [2021-06-05 17:12:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:07,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387020499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:07,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:07,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 17:12:07,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090813004] [2021-06-05 17:12:07,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:12:07,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:07,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:12:07,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:12:07,359 INFO L87 Difference]: Start difference. First operand 50371 states and 195199 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:08,470 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-05 17:12:09,345 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2021-06-05 17:12:09,683 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-06-05 17:12:10,001 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-06-05 17:12:10,336 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-05 17:12:10,706 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-05 17:12:11,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:11,892 INFO L93 Difference]: Finished difference Result 71419 states and 267281 transitions. [2021-06-05 17:12:11,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 17:12:11,893 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:12:11,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:12,079 INFO L225 Difference]: With dead ends: 71419 [2021-06-05 17:12:12,079 INFO L226 Difference]: Without dead ends: 71404 [2021-06-05 17:12:12,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 3710.1ms TimeCoverageRelationStatistics Valid=568, Invalid=3854, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 17:12:12,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71404 states. [2021-06-05 17:12:13,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71404 to 50405. [2021-06-05 17:12:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50405 states, 50404 states have (on average 3.8749702404571065) internal successors, (195314), 50404 states have internal predecessors, (195314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50405 states to 50405 states and 195314 transitions. [2021-06-05 17:12:13,408 INFO L78 Accepts]: Start accepts. Automaton has 50405 states and 195314 transitions. Word has length 30 [2021-06-05 17:12:13,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:13,408 INFO L482 AbstractCegarLoop]: Abstraction has 50405 states and 195314 transitions. [2021-06-05 17:12:13,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:13,408 INFO L276 IsEmpty]: Start isEmpty. Operand 50405 states and 195314 transitions. [2021-06-05 17:12:13,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:12:13,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:13,502 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:12:13,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 17:12:13,703 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:13,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:13,703 INFO L82 PathProgramCache]: Analyzing trace with hash -610282946, now seen corresponding path program 180 times [2021-06-05 17:12:13,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:13,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101043986] [2021-06-05 17:12:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:14,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:14,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101043986] [2021-06-05 17:12:14,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101043986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:14,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274767758] [2021-06-05 17:12:14,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:14,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:12:14,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:14,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:12:14,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:14,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:14,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:14,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:14,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:14,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:14,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:14,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 17:12:14,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:12:14,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:12:14,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:12:14,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 17:12:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:14,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274767758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:14,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:14,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:12:14,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570576748] [2021-06-05 17:12:14,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:12:14,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:14,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:12:14,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:12:14,338 INFO L87 Difference]: Start difference. First operand 50405 states and 195314 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:17,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:17,270 INFO L93 Difference]: Finished difference Result 83242 states and 309514 transitions. [2021-06-05 17:12:17,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 17:12:17,271 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:12:17,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:17,489 INFO L225 Difference]: With dead ends: 83242 [2021-06-05 17:12:17,489 INFO L226 Difference]: Without dead ends: 83227 [2021-06-05 17:12:17,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 2240.9ms TimeCoverageRelationStatistics Valid=401, Invalid=3259, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 17:12:17,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83227 states. [2021-06-05 17:12:18,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83227 to 50447. [2021-06-05 17:12:18,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50447 states, 50446 states have (on average 3.874499464774214) internal successors, (195453), 50446 states have internal predecessors, (195453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:18,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50447 states to 50447 states and 195453 transitions. [2021-06-05 17:12:18,953 INFO L78 Accepts]: Start accepts. Automaton has 50447 states and 195453 transitions. Word has length 30 [2021-06-05 17:12:18,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:18,953 INFO L482 AbstractCegarLoop]: Abstraction has 50447 states and 195453 transitions. [2021-06-05 17:12:18,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:18,953 INFO L276 IsEmpty]: Start isEmpty. Operand 50447 states and 195453 transitions. [2021-06-05 17:12:19,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:12:19,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:19,034 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:12:19,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:19,235 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:19,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:19,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1538513590, now seen corresponding path program 181 times [2021-06-05 17:12:19,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:19,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691158363] [2021-06-05 17:12:19,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:19,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:19,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691158363] [2021-06-05 17:12:19,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691158363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:19,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298751282] [2021-06-05 17:12:19,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:19,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:19,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:12:19,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:19,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:19,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:19,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:19,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:19,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:19,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 17:12:19,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:12:19,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:12:19,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:12:19,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 17:12:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:19,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298751282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:19,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:19,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:12:19,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541996117] [2021-06-05 17:12:19,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:12:19,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:19,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:12:19,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:12:19,712 INFO L87 Difference]: Start difference. First operand 50447 states and 195453 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:22,801 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-05 17:12:23,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:23,449 INFO L93 Difference]: Finished difference Result 94065 states and 345973 transitions. [2021-06-05 17:12:23,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 17:12:23,449 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:12:23,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:23,687 INFO L225 Difference]: With dead ends: 94065 [2021-06-05 17:12:23,687 INFO L226 Difference]: Without dead ends: 94014 [2021-06-05 17:12:23,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2534.0ms TimeCoverageRelationStatistics Valid=507, Invalid=3653, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 17:12:23,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94014 states. [2021-06-05 17:12:25,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94014 to 50456. [2021-06-05 17:12:25,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50456 states, 50455 states have (on average 3.8745813100782875) internal successors, (195492), 50455 states have internal predecessors, (195492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:25,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50456 states to 50456 states and 195492 transitions. [2021-06-05 17:12:25,268 INFO L78 Accepts]: Start accepts. Automaton has 50456 states and 195492 transitions. Word has length 30 [2021-06-05 17:12:25,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:25,268 INFO L482 AbstractCegarLoop]: Abstraction has 50456 states and 195492 transitions. [2021-06-05 17:12:25,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:25,268 INFO L276 IsEmpty]: Start isEmpty. Operand 50456 states and 195492 transitions. [2021-06-05 17:12:25,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:12:25,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:25,347 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:12:25,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:25,547 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:25,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:25,547 INFO L82 PathProgramCache]: Analyzing trace with hash -372848078, now seen corresponding path program 90 times [2021-06-05 17:12:25,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:25,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340876907] [2021-06-05 17:12:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:25,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:25,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340876907] [2021-06-05 17:12:25,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340876907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:25,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459654526] [2021-06-05 17:12:25,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:25,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:12:25,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:25,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 17:12:25,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:26,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:26,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:26,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:26,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:26,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:26,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:26,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:26,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:26,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:26,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 17:12:26,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:12:26,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:12:26,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:12:26,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:12 [2021-06-05 17:12:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:26,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459654526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:26,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:26,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 17:12:26,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353477029] [2021-06-05 17:12:26,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:12:26,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:26,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:12:26,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:12:26,244 INFO L87 Difference]: Start difference. First operand 50456 states and 195492 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:26,541 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-06-05 17:12:27,515 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 17:12:27,893 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-05 17:12:28,493 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-05 17:12:28,695 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-06-05 17:12:29,078 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 17:12:30,038 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-05 17:12:30,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:30,959 INFO L93 Difference]: Finished difference Result 63848 states and 240271 transitions. [2021-06-05 17:12:30,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 17:12:30,960 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:12:30,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:31,123 INFO L225 Difference]: With dead ends: 63848 [2021-06-05 17:12:31,124 INFO L226 Difference]: Without dead ends: 63833 [2021-06-05 17:12:31,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 4021.7ms TimeCoverageRelationStatistics Valid=540, Invalid=3366, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 17:12:31,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63833 states. [2021-06-05 17:12:32,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63833 to 50491. [2021-06-05 17:12:32,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50491 states, 50490 states have (on average 3.873598732422262) internal successors, (195578), 50490 states have internal predecessors, (195578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:32,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50491 states to 50491 states and 195578 transitions. [2021-06-05 17:12:32,373 INFO L78 Accepts]: Start accepts. Automaton has 50491 states and 195578 transitions. Word has length 30 [2021-06-05 17:12:32,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:32,373 INFO L482 AbstractCegarLoop]: Abstraction has 50491 states and 195578 transitions. [2021-06-05 17:12:32,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:32,374 INFO L276 IsEmpty]: Start isEmpty. Operand 50491 states and 195578 transitions. [2021-06-05 17:12:32,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:12:32,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:32,456 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:12:32,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:32,657 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:32,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:32,657 INFO L82 PathProgramCache]: Analyzing trace with hash -792944066, now seen corresponding path program 182 times [2021-06-05 17:12:32,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:32,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798783802] [2021-06-05 17:12:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:32,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:32,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798783802] [2021-06-05 17:12:32,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798783802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:32,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810275744] [2021-06-05 17:12:32,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:32,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:12:32,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:32,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:12:32,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:33,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:33,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:33,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:33,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:33,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:33,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:33,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 17:12:33,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:12:33,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:12:33,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:12:33,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 17:12:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:33,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810275744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:33,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:33,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:12:33,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139769145] [2021-06-05 17:12:33,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:12:33,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:33,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:12:33,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:12:33,104 INFO L87 Difference]: Start difference. First operand 50491 states and 195578 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:33,974 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-06-05 17:12:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:36,304 INFO L93 Difference]: Finished difference Result 84008 states and 311824 transitions. [2021-06-05 17:12:36,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:12:36,304 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:12:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:36,736 INFO L225 Difference]: With dead ends: 84008 [2021-06-05 17:12:36,736 INFO L226 Difference]: Without dead ends: 83993 [2021-06-05 17:12:36,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 2125.6ms TimeCoverageRelationStatistics Valid=357, Invalid=2949, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 17:12:36,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83993 states. [2021-06-05 17:12:37,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83993 to 50558. [2021-06-05 17:12:38,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50558 states, 50557 states have (on average 3.873133295092668) internal successors, (195814), 50557 states have internal predecessors, (195814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50558 states to 50558 states and 195814 transitions. [2021-06-05 17:12:38,177 INFO L78 Accepts]: Start accepts. Automaton has 50558 states and 195814 transitions. Word has length 30 [2021-06-05 17:12:38,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:38,177 INFO L482 AbstractCegarLoop]: Abstraction has 50558 states and 195814 transitions. [2021-06-05 17:12:38,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:38,177 INFO L276 IsEmpty]: Start isEmpty. Operand 50558 states and 195814 transitions. [2021-06-05 17:12:38,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:12:38,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:38,258 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:12:38,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:38,458 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:38,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:38,459 INFO L82 PathProgramCache]: Analyzing trace with hash 956036336, now seen corresponding path program 183 times [2021-06-05 17:12:38,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:38,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518618633] [2021-06-05 17:12:38,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:38,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:38,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:38,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518618633] [2021-06-05 17:12:38,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518618633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:38,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407837583] [2021-06-05 17:12:38,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:38,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:12:38,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:38,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 17:12:38,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:39,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:39,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:39,096 INFO L354 Elim1Store]: treesize reduction 37, result has 49.3 percent of original size [2021-06-05 17:12:39,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 57 treesize of output 76 [2021-06-05 17:12:39,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:12:39,176 INFO L628 ElimStorePlain]: treesize reduction 25, result has 80.8 percent of original size [2021-06-05 17:12:39,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:12:39,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:75, output treesize:33 [2021-06-05 17:12:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:39,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407837583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:39,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:39,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-06-05 17:12:39,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000258265] [2021-06-05 17:12:39,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 17:12:39,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:39,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 17:12:39,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:12:39,227 INFO L87 Difference]: Start difference. First operand 50558 states and 195814 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:42,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:42,868 INFO L93 Difference]: Finished difference Result 83166 states and 309365 transitions. [2021-06-05 17:12:42,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:12:42,869 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:12:42,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:43,328 INFO L225 Difference]: With dead ends: 83166 [2021-06-05 17:12:43,328 INFO L226 Difference]: Without dead ends: 83136 [2021-06-05 17:12:43,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 2478.7ms TimeCoverageRelationStatistics Valid=345, Invalid=3195, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:12:43,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83136 states. [2021-06-05 17:12:44,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83136 to 50558. [2021-06-05 17:12:44,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50558 states, 50557 states have (on average 3.873133295092668) internal successors, (195814), 50557 states have internal predecessors, (195814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:44,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50558 states to 50558 states and 195814 transitions. [2021-06-05 17:12:44,728 INFO L78 Accepts]: Start accepts. Automaton has 50558 states and 195814 transitions. Word has length 30 [2021-06-05 17:12:44,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:44,728 INFO L482 AbstractCegarLoop]: Abstraction has 50558 states and 195814 transitions. [2021-06-05 17:12:44,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:44,728 INFO L276 IsEmpty]: Start isEmpty. Operand 50558 states and 195814 transitions. [2021-06-05 17:12:44,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:12:44,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:44,808 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:12:45,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:45,008 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:45,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:45,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1261273866, now seen corresponding path program 184 times [2021-06-05 17:12:45,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:45,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8453332] [2021-06-05 17:12:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:45,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:45,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8453332] [2021-06-05 17:12:45,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8453332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:45,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98148932] [2021-06-05 17:12:45,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:45,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:12:45,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:45,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:12:45,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:45,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:45,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:45,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:45,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 17:12:45,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:12:45,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:12:45,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:12:45,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-06-05 17:12:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:45,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98148932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:45,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:45,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:12:45,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063672681] [2021-06-05 17:12:45,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:12:45,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:45,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:12:45,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:12:45,496 INFO L87 Difference]: Start difference. First operand 50558 states and 195814 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:47,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:47,959 INFO L93 Difference]: Finished difference Result 69018 states and 261530 transitions. [2021-06-05 17:12:47,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:12:47,960 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:12:47,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:48,154 INFO L225 Difference]: With dead ends: 69018 [2021-06-05 17:12:48,154 INFO L226 Difference]: Without dead ends: 68952 [2021-06-05 17:12:48,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1867.1ms TimeCoverageRelationStatistics Valid=521, Invalid=2131, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:12:48,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68952 states. [2021-06-05 17:12:49,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68952 to 50665. [2021-06-05 17:12:49,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50665 states, 50664 states have (on average 3.873263066477183) internal successors, (196235), 50664 states have internal predecessors, (196235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:49,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50665 states to 50665 states and 196235 transitions. [2021-06-05 17:12:49,542 INFO L78 Accepts]: Start accepts. Automaton has 50665 states and 196235 transitions. Word has length 30 [2021-06-05 17:12:49,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:49,542 INFO L482 AbstractCegarLoop]: Abstraction has 50665 states and 196235 transitions. [2021-06-05 17:12:49,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:49,542 INFO L276 IsEmpty]: Start isEmpty. Operand 50665 states and 196235 transitions. [2021-06-05 17:12:49,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:12:49,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:49,630 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:12:49,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-05 17:12:49,831 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:49,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:49,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1005295414, now seen corresponding path program 185 times [2021-06-05 17:12:49,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:49,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34548089] [2021-06-05 17:12:49,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:50,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:50,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34548089] [2021-06-05 17:12:50,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34548089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:50,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125099615] [2021-06-05 17:12:50,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:50,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:12:50,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:50,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:12:50,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:50,463 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-06-05 17:12:50,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:50,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:50,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:50,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 17:12:50,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:12:50,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:12:50,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:12:50,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-06-05 17:12:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:50,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125099615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:50,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:50,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:12:50,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779661256] [2021-06-05 17:12:50,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:12:50,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:50,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:12:50,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:12:50,542 INFO L87 Difference]: Start difference. First operand 50665 states and 196235 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:52,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:52,618 INFO L93 Difference]: Finished difference Result 68874 states and 261214 transitions. [2021-06-05 17:12:52,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 17:12:52,618 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:12:52,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:52,801 INFO L225 Difference]: With dead ends: 68874 [2021-06-05 17:12:52,801 INFO L226 Difference]: Without dead ends: 68826 [2021-06-05 17:12:52,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1429.3ms TimeCoverageRelationStatistics Valid=498, Invalid=2052, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:12:53,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68826 states. [2021-06-05 17:12:53,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68826 to 50649. [2021-06-05 17:12:54,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50649 states, 50648 states have (on average 3.8736574000947717) internal successors, (196193), 50648 states have internal predecessors, (196193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50649 states to 50649 states and 196193 transitions. [2021-06-05 17:12:54,369 INFO L78 Accepts]: Start accepts. Automaton has 50649 states and 196193 transitions. Word has length 30 [2021-06-05 17:12:54,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:54,369 INFO L482 AbstractCegarLoop]: Abstraction has 50649 states and 196193 transitions. [2021-06-05 17:12:54,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:54,369 INFO L276 IsEmpty]: Start isEmpty. Operand 50649 states and 196193 transitions. [2021-06-05 17:12:54,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:12:54,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:54,449 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:12:54,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 17:12:54,650 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:54,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:54,650 INFO L82 PathProgramCache]: Analyzing trace with hash -893195398, now seen corresponding path program 186 times [2021-06-05 17:12:54,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:54,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758323833] [2021-06-05 17:12:54,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:54,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:54,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758323833] [2021-06-05 17:12:54,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758323833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:54,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777327385] [2021-06-05 17:12:54,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:54,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:12:54,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:54,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:12:54,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:55,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:55,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:55,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:55,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 17:12:55,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:12:55,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:12:55,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:12:55,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-06-05 17:12:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:55,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777327385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:55,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:55,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:12:55,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201289151] [2021-06-05 17:12:55,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:12:55,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:55,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:12:55,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:12:55,174 INFO L87 Difference]: Start difference. First operand 50649 states and 196193 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:57,113 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-06-05 17:12:57,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:57,905 INFO L93 Difference]: Finished difference Result 72235 states and 271440 transitions. [2021-06-05 17:12:57,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:12:57,906 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:12:57,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:58,097 INFO L225 Difference]: With dead ends: 72235 [2021-06-05 17:12:58,098 INFO L226 Difference]: Without dead ends: 72163 [2021-06-05 17:12:58,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 1989.8ms TimeCoverageRelationStatistics Valid=695, Invalid=2727, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:12:58,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72163 states. [2021-06-05 17:12:59,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72163 to 50684. [2021-06-05 17:12:59,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50684 states, 50683 states have (on average 3.8730738117317443) internal successors, (196299), 50683 states have internal predecessors, (196299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50684 states to 50684 states and 196299 transitions. [2021-06-05 17:12:59,549 INFO L78 Accepts]: Start accepts. Automaton has 50684 states and 196299 transitions. Word has length 30 [2021-06-05 17:12:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:59,549 INFO L482 AbstractCegarLoop]: Abstraction has 50684 states and 196299 transitions. [2021-06-05 17:12:59,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:59,550 INFO L276 IsEmpty]: Start isEmpty. Operand 50684 states and 196299 transitions. [2021-06-05 17:12:59,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:12:59,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:59,633 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:12:59,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:59,834 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:59,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:59,834 INFO L82 PathProgramCache]: Analyzing trace with hash -319132678, now seen corresponding path program 187 times [2021-06-05 17:12:59,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:59,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943173389] [2021-06-05 17:12:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:59,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:59,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943173389] [2021-06-05 17:12:59,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943173389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:59,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468159705] [2021-06-05 17:12:59,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:00,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 17:13:00,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:00,482 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-06-05 17:13:00,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:00,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:13:00,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:00,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:00,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:00,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:13:00,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 17:13:00,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:13:00,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:00,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:13:00,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:15 [2021-06-05 17:13:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:00,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468159705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:00,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:00,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 17:13:00,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148133414] [2021-06-05 17:13:00,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:13:00,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:00,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:13:00,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:13:00,581 INFO L87 Difference]: Start difference. First operand 50684 states and 196299 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:03,749 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-05 17:13:05,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:05,223 INFO L93 Difference]: Finished difference Result 91851 states and 339846 transitions. [2021-06-05 17:13:05,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 17:13:05,224 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:13:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:05,460 INFO L225 Difference]: With dead ends: 91851 [2021-06-05 17:13:05,460 INFO L226 Difference]: Without dead ends: 91815 [2021-06-05 17:13:05,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 3788.7ms TimeCoverageRelationStatistics Valid=631, Invalid=5221, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 17:13:05,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91815 states. [2021-06-05 17:13:06,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91815 to 50856. [2021-06-05 17:13:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50856 states, 50855 states have (on average 3.8713007570543705) internal successors, (196875), 50855 states have internal predecessors, (196875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:07,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50856 states to 50856 states and 196875 transitions. [2021-06-05 17:13:07,345 INFO L78 Accepts]: Start accepts. Automaton has 50856 states and 196875 transitions. Word has length 30 [2021-06-05 17:13:07,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:07,345 INFO L482 AbstractCegarLoop]: Abstraction has 50856 states and 196875 transitions. [2021-06-05 17:13:07,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:07,345 INFO L276 IsEmpty]: Start isEmpty. Operand 50856 states and 196875 transitions. [2021-06-05 17:13:07,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:13:07,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:07,438 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:13:07,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-06-05 17:13:07,638 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:07,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:07,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1890767390, now seen corresponding path program 188 times [2021-06-05 17:13:07,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:07,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148132483] [2021-06-05 17:13:07,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:07,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:07,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148132483] [2021-06-05 17:13:07,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148132483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:07,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512756877] [2021-06-05 17:13:07,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:07,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:13:07,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:13:07,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 17:13:07,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:08,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:08,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:08,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:08,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-06-05 17:13:08,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:13:08,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:08,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:13:08,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:23 [2021-06-05 17:13:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:08,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512756877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:08,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:08,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-06-05 17:13:08,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612078908] [2021-06-05 17:13:08,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:13:08,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:08,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:13:08,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:13:08,224 INFO L87 Difference]: Start difference. First operand 50856 states and 196875 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:10,433 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-05 17:13:13,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:13,115 INFO L93 Difference]: Finished difference Result 71154 states and 268043 transitions. [2021-06-05 17:13:13,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:13:13,115 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:13:13,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:13,317 INFO L225 Difference]: With dead ends: 71154 [2021-06-05 17:13:13,317 INFO L226 Difference]: Without dead ends: 71103 [2021-06-05 17:13:13,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 3805.9ms TimeCoverageRelationStatistics Valid=839, Invalid=4563, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 17:13:13,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71103 states. [2021-06-05 17:13:14,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71103 to 50856. [2021-06-05 17:13:14,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50856 states, 50855 states have (on average 3.8713007570543705) internal successors, (196875), 50855 states have internal predecessors, (196875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50856 states to 50856 states and 196875 transitions. [2021-06-05 17:13:14,876 INFO L78 Accepts]: Start accepts. Automaton has 50856 states and 196875 transitions. Word has length 30 [2021-06-05 17:13:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:14,876 INFO L482 AbstractCegarLoop]: Abstraction has 50856 states and 196875 transitions. [2021-06-05 17:13:14,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:14,877 INFO L276 IsEmpty]: Start isEmpty. Operand 50856 states and 196875 transitions. [2021-06-05 17:13:14,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:13:14,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:14,963 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:13:15,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:15,164 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:15,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:15,164 INFO L82 PathProgramCache]: Analyzing trace with hash -137630626, now seen corresponding path program 189 times [2021-06-05 17:13:15,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:15,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604746283] [2021-06-05 17:13:15,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:15,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:15,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604746283] [2021-06-05 17:13:15,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604746283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:15,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277051556] [2021-06-05 17:13:15,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:15,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:13:15,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:13:15,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:13:15,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:15,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:15,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 17:13:15,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:13:15,683 INFO L628 ElimStorePlain]: treesize reduction 53, result has 45.9 percent of original size [2021-06-05 17:13:15,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 17:13:15,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:103 [2021-06-05 17:13:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:15,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277051556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:15,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:15,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 17:13:15,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743949724] [2021-06-05 17:13:15,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:13:15,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:15,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:13:15,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:13:15,770 INFO L87 Difference]: Start difference. First operand 50856 states and 196875 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:19,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:19,657 INFO L93 Difference]: Finished difference Result 71044 states and 267781 transitions. [2021-06-05 17:13:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 17:13:19,658 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:13:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:19,850 INFO L225 Difference]: With dead ends: 71044 [2021-06-05 17:13:19,851 INFO L226 Difference]: Without dead ends: 70990 [2021-06-05 17:13:19,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 2819.3ms TimeCoverageRelationStatistics Valid=670, Invalid=3886, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:13:19,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70990 states. [2021-06-05 17:13:21,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70990 to 50820. [2021-06-05 17:13:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50820 states, 50819 states have (on average 3.8718195950333536) internal successors, (196762), 50819 states have internal predecessors, (196762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50820 states to 50820 states and 196762 transitions. [2021-06-05 17:13:21,424 INFO L78 Accepts]: Start accepts. Automaton has 50820 states and 196762 transitions. Word has length 30 [2021-06-05 17:13:21,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:21,424 INFO L482 AbstractCegarLoop]: Abstraction has 50820 states and 196762 transitions. [2021-06-05 17:13:21,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:21,424 INFO L276 IsEmpty]: Start isEmpty. Operand 50820 states and 196762 transitions. [2021-06-05 17:13:21,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:13:21,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:21,510 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:13:21,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable496,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:21,711 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:21,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:21,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2075040334, now seen corresponding path program 190 times [2021-06-05 17:13:21,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:21,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680448981] [2021-06-05 17:13:21,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:21,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:21,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680448981] [2021-06-05 17:13:21,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680448981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:21,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276192174] [2021-06-05 17:13:21,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:21,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:13:21,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:13:21,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:13:21,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:22,170 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-05 17:13:22,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-06-05 17:13:22,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:13:22,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:22,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:13:22,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-05 17:13:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:22,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276192174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:22,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:22,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:13:22,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090818121] [2021-06-05 17:13:22,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:13:22,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:22,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:13:22,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:13:22,192 INFO L87 Difference]: Start difference. First operand 50820 states and 196762 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:24,163 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-06-05 17:13:25,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:25,246 INFO L93 Difference]: Finished difference Result 76562 states and 289629 transitions. [2021-06-05 17:13:25,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 17:13:25,247 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:13:25,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:25,458 INFO L225 Difference]: With dead ends: 76562 [2021-06-05 17:13:25,458 INFO L226 Difference]: Without dead ends: 76526 [2021-06-05 17:13:25,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 2199.6ms TimeCoverageRelationStatistics Valid=647, Invalid=2893, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:13:25,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76526 states. [2021-06-05 17:13:26,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76526 to 50849. [2021-06-05 17:13:26,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50849 states, 50848 states have (on average 3.8721286972938955) internal successors, (196890), 50848 states have internal predecessors, (196890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:26,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50849 states to 50849 states and 196890 transitions. [2021-06-05 17:13:26,896 INFO L78 Accepts]: Start accepts. Automaton has 50849 states and 196890 transitions. Word has length 30 [2021-06-05 17:13:26,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:26,896 INFO L482 AbstractCegarLoop]: Abstraction has 50849 states and 196890 transitions. [2021-06-05 17:13:26,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:26,896 INFO L276 IsEmpty]: Start isEmpty. Operand 50849 states and 196890 transitions. [2021-06-05 17:13:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:13:26,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:26,985 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:13:27,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:27,185 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:27,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:27,185 INFO L82 PathProgramCache]: Analyzing trace with hash 2052117870, now seen corresponding path program 191 times [2021-06-05 17:13:27,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:27,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290707643] [2021-06-05 17:13:27,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:27,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:27,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290707643] [2021-06-05 17:13:27,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290707643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:27,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676090354] [2021-06-05 17:13:27,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:27,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:13:27,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:13:27,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:13:27,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:27,675 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 17:13:27,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:27,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:27,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:13:27,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 17:13:27,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:13:27,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:27,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:13:27,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-05 17:13:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:27,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676090354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:27,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:27,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 17:13:27,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050469956] [2021-06-05 17:13:27,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:13:27,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:27,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:13:27,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:13:27,872 INFO L87 Difference]: Start difference. First operand 50849 states and 196890 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:29,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:29,047 INFO L93 Difference]: Finished difference Result 60558 states and 229990 transitions. [2021-06-05 17:13:29,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:13:29,047 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:13:29,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:29,214 INFO L225 Difference]: With dead ends: 60558 [2021-06-05 17:13:29,215 INFO L226 Difference]: Without dead ends: 60543 [2021-06-05 17:13:29,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 790.0ms TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:13:29,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60543 states. [2021-06-05 17:13:30,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60543 to 50841. [2021-06-05 17:13:30,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50841 states, 50840 states have (on average 3.8721872541306057) internal successors, (196862), 50840 states have internal predecessors, (196862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:30,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50841 states to 50841 states and 196862 transitions. [2021-06-05 17:13:30,573 INFO L78 Accepts]: Start accepts. Automaton has 50841 states and 196862 transitions. Word has length 30 [2021-06-05 17:13:30,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:30,573 INFO L482 AbstractCegarLoop]: Abstraction has 50841 states and 196862 transitions. [2021-06-05 17:13:30,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:30,573 INFO L276 IsEmpty]: Start isEmpty. Operand 50841 states and 196862 transitions. [2021-06-05 17:13:30,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:13:30,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:30,656 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:13:30,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:30,856 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:30,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:30,857 INFO L82 PathProgramCache]: Analyzing trace with hash -15398158, now seen corresponding path program 192 times [2021-06-05 17:13:30,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:30,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841581754] [2021-06-05 17:13:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:31,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:31,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841581754] [2021-06-05 17:13:31,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841581754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:31,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993326210] [2021-06-05 17:13:31,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:31,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:13:31,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:13:31,057 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 17:13:31,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:31,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:31,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 27 treesize of output 71 [2021-06-05 17:13:31,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:13:31,734 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 55 [2021-06-05 17:13:31,734 INFO L628 ElimStorePlain]: treesize reduction 217, result has 29.5 percent of original size [2021-06-05 17:13:31,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:13:31,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:200 [2021-06-05 17:13:31,885 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-06-05 17:13:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:32,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993326210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:32,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:32,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 25 [2021-06-05 17:13:32,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125987576] [2021-06-05 17:13:32,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 17:13:32,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:32,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 17:13:32,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:13:32,014 INFO L87 Difference]: Start difference. First operand 50841 states and 196862 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:34,199 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-06-05 17:13:35,196 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-06-05 17:13:37,852 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-05 17:13:38,165 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-06-05 17:13:38,468 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-05 17:13:38,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:38,887 INFO L93 Difference]: Finished difference Result 81005 states and 305937 transitions. [2021-06-05 17:13:38,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 17:13:38,888 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:13:38,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:39,105 INFO L225 Difference]: With dead ends: 81005 [2021-06-05 17:13:39,105 INFO L226 Difference]: Without dead ends: 80960 [2021-06-05 17:13:39,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3094 ImplicationChecksByTransitivity, 5636.2ms TimeCoverageRelationStatistics Valid=1313, Invalid=7807, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 17:13:39,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80960 states. [2021-06-05 17:13:40,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80960 to 50848. [2021-06-05 17:13:40,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50848 states, 50847 states have (on average 3.8721851829999805) internal successors, (196889), 50847 states have internal predecessors, (196889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:40,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50848 states to 50848 states and 196889 transitions. [2021-06-05 17:13:40,530 INFO L78 Accepts]: Start accepts. Automaton has 50848 states and 196889 transitions. Word has length 30 [2021-06-05 17:13:40,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:40,530 INFO L482 AbstractCegarLoop]: Abstraction has 50848 states and 196889 transitions. [2021-06-05 17:13:40,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:40,531 INFO L276 IsEmpty]: Start isEmpty. Operand 50848 states and 196889 transitions. [2021-06-05 17:13:40,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:13:40,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:40,609 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:13:40,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-06-05 17:13:40,810 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:40,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:40,810 INFO L82 PathProgramCache]: Analyzing trace with hash -512119518, now seen corresponding path program 193 times [2021-06-05 17:13:40,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:40,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031505321] [2021-06-05 17:13:40,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:40,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:40,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031505321] [2021-06-05 17:13:40,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031505321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:40,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118268265] [2021-06-05 17:13:40,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:41,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:13:41,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:41,465 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-05 17:13:41,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-06-05 17:13:41,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:13:41,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:41,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:13:41,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-05 17:13:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:41,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118268265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:41,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:41,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:13:41,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238996055] [2021-06-05 17:13:41,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:13:41,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:41,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:13:41,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:13:41,488 INFO L87 Difference]: Start difference. First operand 50848 states and 196889 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:44,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:44,199 INFO L93 Difference]: Finished difference Result 77700 states and 291511 transitions. [2021-06-05 17:13:44,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:13:44,200 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:13:44,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:44,390 INFO L225 Difference]: With dead ends: 77700 [2021-06-05 17:13:44,391 INFO L226 Difference]: Without dead ends: 77655 [2021-06-05 17:13:44,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 1817.6ms TimeCoverageRelationStatistics Valid=677, Invalid=2745, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:13:44,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77655 states. [2021-06-05 17:13:45,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77655 to 50905. [2021-06-05 17:13:45,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50905 states, 50904 states have (on average 3.873035517837498) internal successors, (197153), 50904 states have internal predecessors, (197153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:45,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50905 states to 50905 states and 197153 transitions. [2021-06-05 17:13:45,845 INFO L78 Accepts]: Start accepts. Automaton has 50905 states and 197153 transitions. Word has length 30 [2021-06-05 17:13:45,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:45,845 INFO L482 AbstractCegarLoop]: Abstraction has 50905 states and 197153 transitions. [2021-06-05 17:13:45,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:45,845 INFO L276 IsEmpty]: Start isEmpty. Operand 50905 states and 197153 transitions. [2021-06-05 17:13:45,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:13:45,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:45,924 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:13:46,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:46,124 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:46,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:46,124 INFO L82 PathProgramCache]: Analyzing trace with hash -2129652298, now seen corresponding path program 194 times [2021-06-05 17:13:46,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:46,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338763031] [2021-06-05 17:13:46,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:46,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:46,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338763031] [2021-06-05 17:13:46,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338763031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:46,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538012770] [2021-06-05 17:13:46,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:46,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:13:46,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:13:46,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:13:46,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:46,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:46,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:46,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:46,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-06-05 17:13:46,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:13:46,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:46,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:13:46,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:23 [2021-06-05 17:13:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:46,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538012770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:46,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:46,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:13:46,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869856592] [2021-06-05 17:13:46,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:13:46,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:46,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:13:46,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:13:46,579 INFO L87 Difference]: Start difference. First operand 50905 states and 197153 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:50,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:50,657 INFO L93 Difference]: Finished difference Result 83144 states and 313968 transitions. [2021-06-05 17:13:50,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 17:13:50,657 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:13:50,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:50,887 INFO L225 Difference]: With dead ends: 83144 [2021-06-05 17:13:50,888 INFO L226 Difference]: Without dead ends: 83114 [2021-06-05 17:13:50,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 2639.0ms TimeCoverageRelationStatistics Valid=1067, Invalid=4633, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 17:13:50,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83114 states. [2021-06-05 17:13:52,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83114 to 50927. [2021-06-05 17:13:52,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50927 states, 50926 states have (on average 3.873443820445352) internal successors, (197259), 50926 states have internal predecessors, (197259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:52,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50927 states to 50927 states and 197259 transitions. [2021-06-05 17:13:52,335 INFO L78 Accepts]: Start accepts. Automaton has 50927 states and 197259 transitions. Word has length 30 [2021-06-05 17:13:52,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:52,335 INFO L482 AbstractCegarLoop]: Abstraction has 50927 states and 197259 transitions. [2021-06-05 17:13:52,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:52,335 INFO L276 IsEmpty]: Start isEmpty. Operand 50927 states and 197259 transitions. [2021-06-05 17:13:52,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:13:52,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:52,416 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:13:52,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-05 17:13:52,617 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:52,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:52,617 INFO L82 PathProgramCache]: Analyzing trace with hash 382550838, now seen corresponding path program 195 times [2021-06-05 17:13:52,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:52,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551890019] [2021-06-05 17:13:52,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:52,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:52,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551890019] [2021-06-05 17:13:52,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551890019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:52,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146409466] [2021-06-05 17:13:52,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:52,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:13:52,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:13:52,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:13:52,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:53,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:53,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 17:13:53,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:13:53,127 INFO L628 ElimStorePlain]: treesize reduction 51, result has 46.9 percent of original size [2021-06-05 17:13:53,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 17:13:53,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:83 [2021-06-05 17:13:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:53,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146409466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:53,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:53,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 17:13:53,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659621923] [2021-06-05 17:13:53,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:13:53,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:53,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:13:53,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:13:53,215 INFO L87 Difference]: Start difference. First operand 50927 states and 197259 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:54,012 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2021-06-05 17:13:56,434 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-05 17:13:56,907 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-06-05 17:13:57,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:57,827 INFO L93 Difference]: Finished difference Result 74529 states and 282265 transitions. [2021-06-05 17:13:57,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 17:13:57,828 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:13:57,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:58,042 INFO L225 Difference]: With dead ends: 74529 [2021-06-05 17:13:58,042 INFO L226 Difference]: Without dead ends: 74499 [2021-06-05 17:13:58,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 3397.2ms TimeCoverageRelationStatistics Valid=826, Invalid=4144, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 17:13:58,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74499 states. [2021-06-05 17:13:59,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74499 to 50939. [2021-06-05 17:13:59,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50939 states, 50938 states have (on average 3.8735717931603126) internal successors, (197312), 50938 states have internal predecessors, (197312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:59,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50939 states to 50939 states and 197312 transitions. [2021-06-05 17:13:59,499 INFO L78 Accepts]: Start accepts. Automaton has 50939 states and 197312 transitions. Word has length 30 [2021-06-05 17:13:59,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:59,499 INFO L482 AbstractCegarLoop]: Abstraction has 50939 states and 197312 transitions. [2021-06-05 17:13:59,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:59,499 INFO L276 IsEmpty]: Start isEmpty. Operand 50939 states and 197312 transitions. [2021-06-05 17:13:59,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:13:59,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:59,581 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:13:59,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable539 [2021-06-05 17:13:59,782 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:59,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:59,782 INFO L82 PathProgramCache]: Analyzing trace with hash 956613558, now seen corresponding path program 196 times [2021-06-05 17:13:59,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:59,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358163676] [2021-06-05 17:13:59,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:59,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:59,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358163676] [2021-06-05 17:13:59,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358163676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:59,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624992698] [2021-06-05 17:13:59,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:59,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:13:59,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:13:59,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 17:13:59,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:14:00,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:00,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:00,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:14:00,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:00,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:14:00,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:00,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 17:14:00,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:14:00,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:14:00,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:14:00,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:22 [2021-06-05 17:14:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:00,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624992698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:00,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:14:00,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 17:14:00,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237093417] [2021-06-05 17:14:00,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:14:00,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:14:00,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:14:00,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:14:00,329 INFO L87 Difference]: Start difference. First operand 50939 states and 197312 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:01,094 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-06-05 17:14:06,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:14:06,846 INFO L93 Difference]: Finished difference Result 97250 states and 359275 transitions. [2021-06-05 17:14:06,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 17:14:06,846 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:14:06,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:14:07,113 INFO L225 Difference]: With dead ends: 97250 [2021-06-05 17:14:07,113 INFO L226 Difference]: Without dead ends: 97199 [2021-06-05 17:14:07,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2871 ImplicationChecksByTransitivity, 4689.1ms TimeCoverageRelationStatistics Valid=1104, Invalid=7452, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 17:14:07,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97199 states. [2021-06-05 17:14:08,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97199 to 51032. [2021-06-05 17:14:08,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51032 states, 51031 states have (on average 3.874292096960671) internal successors, (197709), 51031 states have internal predecessors, (197709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:08,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51032 states to 51032 states and 197709 transitions. [2021-06-05 17:14:08,805 INFO L78 Accepts]: Start accepts. Automaton has 51032 states and 197709 transitions. Word has length 30 [2021-06-05 17:14:08,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:14:08,805 INFO L482 AbstractCegarLoop]: Abstraction has 51032 states and 197709 transitions. [2021-06-05 17:14:08,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:08,805 INFO L276 IsEmpty]: Start isEmpty. Operand 51032 states and 197709 transitions. [2021-06-05 17:14:08,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:14:08,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:14:08,890 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:14:09,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:14:09,090 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:14:09,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:14:09,091 INFO L82 PathProgramCache]: Analyzing trace with hash 354888434, now seen corresponding path program 197 times [2021-06-05 17:14:09,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:14:09,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422794362] [2021-06-05 17:14:09,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:14:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:14:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:09,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:14:09,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422794362] [2021-06-05 17:14:09,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422794362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:09,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891817869] [2021-06-05 17:14:09,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:14:09,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:14:09,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:14:09,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:14:09,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:14:09,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:09,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:09,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:14:09,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-06-05 17:14:09,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:14:09,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:14:09,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:14:09,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:23 [2021-06-05 17:14:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:09,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891817869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:09,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:14:09,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:14:09,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108205860] [2021-06-05 17:14:09,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:14:09,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:14:09,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:14:09,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:14:09,538 INFO L87 Difference]: Start difference. First operand 51032 states and 197709 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:12,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:14:12,916 INFO L93 Difference]: Finished difference Result 84956 states and 320071 transitions. [2021-06-05 17:14:12,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 17:14:12,916 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:14:12,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:14:13,156 INFO L225 Difference]: With dead ends: 84956 [2021-06-05 17:14:13,156 INFO L226 Difference]: Without dead ends: 84926 [2021-06-05 17:14:13,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 2480.4ms TimeCoverageRelationStatistics Valid=1060, Invalid=4052, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 17:14:13,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84926 states. [2021-06-05 17:14:14,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84926 to 51051. [2021-06-05 17:14:14,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51051 states, 51050 states have (on average 3.874828599412341) internal successors, (197810), 51050 states have internal predecessors, (197810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:14,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51051 states to 51051 states and 197810 transitions. [2021-06-05 17:14:14,848 INFO L78 Accepts]: Start accepts. Automaton has 51051 states and 197810 transitions. Word has length 30 [2021-06-05 17:14:14,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:14:14,848 INFO L482 AbstractCegarLoop]: Abstraction has 51051 states and 197810 transitions. [2021-06-05 17:14:14,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:14,848 INFO L276 IsEmpty]: Start isEmpty. Operand 51051 states and 197810 transitions. [2021-06-05 17:14:14,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:14:14,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:14:14,932 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:14:15,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:14:15,133 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:14:15,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:14:15,133 INFO L82 PathProgramCache]: Analyzing trace with hash 375624962, now seen corresponding path program 198 times [2021-06-05 17:14:15,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:14:15,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682374601] [2021-06-05 17:14:15,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:14:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:14:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:15,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:14:15,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682374601] [2021-06-05 17:14:15,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682374601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:15,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505437080] [2021-06-05 17:14:15,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:14:15,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:14:15,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:14:15,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:14:15,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:14:15,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:14:15,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:14:15,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 31 [2021-06-05 17:14:15,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:14:15,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:14:15,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:14:15,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-05 17:14:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:15,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505437080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:15,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:14:15,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 17:14:15,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825222328] [2021-06-05 17:14:15,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:14:15,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:14:15,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:14:15,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:14:15,654 INFO L87 Difference]: Start difference. First operand 51051 states and 197810 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:18,386 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-05 17:14:18,699 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-05 17:14:19,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:14:19,419 INFO L93 Difference]: Finished difference Result 78799 states and 296374 transitions. [2021-06-05 17:14:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 17:14:19,421 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:14:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:14:19,642 INFO L225 Difference]: With dead ends: 78799 [2021-06-05 17:14:19,642 INFO L226 Difference]: Without dead ends: 78784 [2021-06-05 17:14:19,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 2884.3ms TimeCoverageRelationStatistics Valid=747, Invalid=3543, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 17:14:19,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78784 states. [2021-06-05 17:14:21,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78784 to 51046. [2021-06-05 17:14:21,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51046 states, 51045 states have (on average 3.8747771574101284) internal successors, (197788), 51045 states have internal predecessors, (197788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51046 states to 51046 states and 197788 transitions. [2021-06-05 17:14:21,271 INFO L78 Accepts]: Start accepts. Automaton has 51046 states and 197788 transitions. Word has length 30 [2021-06-05 17:14:21,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:14:21,271 INFO L482 AbstractCegarLoop]: Abstraction has 51046 states and 197788 transitions. [2021-06-05 17:14:21,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:21,271 INFO L276 IsEmpty]: Start isEmpty. Operand 51046 states and 197788 transitions. [2021-06-05 17:14:21,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:14:21,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:14:21,362 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:14:21,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 289 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-05 17:14:21,563 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:14:21,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:14:21,563 INFO L82 PathProgramCache]: Analyzing trace with hash -2136041370, now seen corresponding path program 199 times [2021-06-05 17:14:21,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:14:21,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631545112] [2021-06-05 17:14:21,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:14:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:14:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:21,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:14:21,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631545112] [2021-06-05 17:14:21,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631545112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:21,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011014878] [2021-06-05 17:14:21,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:14:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:14:21,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 17:14:21,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:14:22,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:14:22,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:22,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:22,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:22,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:22,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:14:22,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 17:14:22,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:14:22,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:14:22,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:14:22,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:22 [2021-06-05 17:14:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:22,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011014878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:22,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:14:22,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 17:14:22,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961472793] [2021-06-05 17:14:22,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:14:22,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:14:22,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:14:22,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:14:22,165 INFO L87 Difference]: Start difference. First operand 51046 states and 197788 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:28,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:14:28,149 INFO L93 Difference]: Finished difference Result 96322 states and 356717 transitions. [2021-06-05 17:14:28,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 17:14:28,150 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:14:28,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:14:28,408 INFO L225 Difference]: With dead ends: 96322 [2021-06-05 17:14:28,408 INFO L226 Difference]: Without dead ends: 96271 [2021-06-05 17:14:28,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2505 ImplicationChecksByTransitivity, 4443.0ms TimeCoverageRelationStatistics Valid=1004, Invalid=6478, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 17:14:28,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96271 states. [2021-06-05 17:14:29,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96271 to 51050. [2021-06-05 17:14:29,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51050 states, 51049 states have (on average 3.874826147426982) internal successors, (197806), 51049 states have internal predecessors, (197806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:30,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51050 states to 51050 states and 197806 transitions. [2021-06-05 17:14:30,096 INFO L78 Accepts]: Start accepts. Automaton has 51050 states and 197806 transitions. Word has length 30 [2021-06-05 17:14:30,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:14:30,096 INFO L482 AbstractCegarLoop]: Abstraction has 51050 states and 197806 transitions. [2021-06-05 17:14:30,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:30,096 INFO L276 IsEmpty]: Start isEmpty. Operand 51050 states and 197806 transitions. [2021-06-05 17:14:30,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:14:30,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:14:30,168 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:14:30,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-05 17:14:30,368 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:14:30,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:14:30,369 INFO L82 PathProgramCache]: Analyzing trace with hash -302392718, now seen corresponding path program 200 times [2021-06-05 17:14:30,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:14:30,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103911328] [2021-06-05 17:14:30,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:14:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:14:30,624 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 19 [2021-06-05 17:14:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:30,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:14:30,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103911328] [2021-06-05 17:14:30,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103911328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:30,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121460145] [2021-06-05 17:14:30,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:14:30,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:14:30,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:14:30,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:14:30,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:14:30,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:30,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:30,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:31,017 INFO L354 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2021-06-05 17:14:31,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 12 case distinctions, treesize of input 82 treesize of output 80 [2021-06-05 17:14:31,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:14:31,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:14:31,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:14:31,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:87, output treesize:22 [2021-06-05 17:14:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:31,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121460145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:31,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:14:31,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 17:14:31,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525110079] [2021-06-05 17:14:31,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:14:31,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:14:31,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:14:31,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:14:31,077 INFO L87 Difference]: Start difference. First operand 51050 states and 197806 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:33,704 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-05 17:14:34,575 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-05 17:14:35,051 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-05 17:14:35,792 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-06-05 17:14:36,364 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-06-05 17:14:37,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:14:37,545 INFO L93 Difference]: Finished difference Result 98122 states and 365133 transitions. [2021-06-05 17:14:37,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 17:14:37,545 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:14:37,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:14:37,811 INFO L225 Difference]: With dead ends: 98122 [2021-06-05 17:14:37,811 INFO L226 Difference]: Without dead ends: 98092 [2021-06-05 17:14:37,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2561 ImplicationChecksByTransitivity, 4641.4ms TimeCoverageRelationStatistics Valid=993, Invalid=6839, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 17:14:37,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98092 states. [2021-06-05 17:14:39,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98092 to 51052. [2021-06-05 17:14:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51052 states, 51051 states have (on average 3.874850639556522) internal successors, (197815), 51051 states have internal predecessors, (197815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:39,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51052 states to 51052 states and 197815 transitions. [2021-06-05 17:14:39,467 INFO L78 Accepts]: Start accepts. Automaton has 51052 states and 197815 transitions. Word has length 30 [2021-06-05 17:14:39,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:14:39,468 INFO L482 AbstractCegarLoop]: Abstraction has 51052 states and 197815 transitions. [2021-06-05 17:14:39,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:39,468 INFO L276 IsEmpty]: Start isEmpty. Operand 51052 states and 197815 transitions. [2021-06-05 17:14:39,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:14:39,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:14:39,549 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:14:39,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:14:39,749 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:14:39,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:14:39,750 INFO L82 PathProgramCache]: Analyzing trace with hash -225306266, now seen corresponding path program 201 times [2021-06-05 17:14:39,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:14:39,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955899893] [2021-06-05 17:14:39,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:14:39,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:14:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:39,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:14:39,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955899893] [2021-06-05 17:14:39,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955899893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:39,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674768905] [2021-06-05 17:14:39,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:14:39,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:14:39,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:14:39,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:14:39,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:14:40,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:14:40,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 17:14:40,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:14:40,579 INFO L628 ElimStorePlain]: treesize reduction 68, result has 39.8 percent of original size [2021-06-05 17:14:40,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 17:14:40,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:82 [2021-06-05 17:14:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:40,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674768905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:40,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:14:40,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 17:14:40,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387331469] [2021-06-05 17:14:40,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:14:40,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:14:40,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:14:40,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:14:40,675 INFO L87 Difference]: Start difference. First operand 51052 states and 197815 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:43,647 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-06-05 17:14:44,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:14:44,872 INFO L93 Difference]: Finished difference Result 63398 states and 235417 transitions. [2021-06-05 17:14:44,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 17:14:44,873 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:14:44,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:14:45,057 INFO L225 Difference]: With dead ends: 63398 [2021-06-05 17:14:45,057 INFO L226 Difference]: Without dead ends: 63290 [2021-06-05 17:14:45,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 3514.6ms TimeCoverageRelationStatistics Valid=699, Invalid=3333, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 17:14:45,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63290 states. [2021-06-05 17:14:46,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63290 to 51149. [2021-06-05 17:14:46,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51149 states, 51148 states have (on average 3.875674513177446) internal successors, (198233), 51148 states have internal predecessors, (198233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:46,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51149 states to 51149 states and 198233 transitions. [2021-06-05 17:14:46,344 INFO L78 Accepts]: Start accepts. Automaton has 51149 states and 198233 transitions. Word has length 30 [2021-06-05 17:14:46,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:14:46,344 INFO L482 AbstractCegarLoop]: Abstraction has 51149 states and 198233 transitions. [2021-06-05 17:14:46,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:46,344 INFO L276 IsEmpty]: Start isEmpty. Operand 51149 states and 198233 transitions. [2021-06-05 17:14:46,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:14:46,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:14:46,430 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:14:46,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-05 17:14:46,630 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:14:46,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:14:46,631 INFO L82 PathProgramCache]: Analyzing trace with hash 348756454, now seen corresponding path program 202 times [2021-06-05 17:14:46,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:14:46,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753159131] [2021-06-05 17:14:46,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:14:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:14:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:46,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:14:46,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753159131] [2021-06-05 17:14:46,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753159131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:46,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767929142] [2021-06-05 17:14:46,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:14:46,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:14:46,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:14:46,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:14:46,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:14:47,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:47,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:47,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:47,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:14:47,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:47,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:14:47,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 17:14:47,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:14:47,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:14:47,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:14:47,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 17:14:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:47,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767929142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:47,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:14:47,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:14:47,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940791165] [2021-06-05 17:14:47,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:14:47,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:14:47,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:14:47,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:14:47,080 INFO L87 Difference]: Start difference. First operand 51149 states and 198233 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:50,666 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-06-05 17:14:51,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:14:51,588 INFO L93 Difference]: Finished difference Result 90253 states and 334745 transitions. [2021-06-05 17:14:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 17:14:51,588 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:14:51,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:14:51,827 INFO L225 Difference]: With dead ends: 90253 [2021-06-05 17:14:51,827 INFO L226 Difference]: Without dead ends: 90208 [2021-06-05 17:14:51,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 3250.7ms TimeCoverageRelationStatistics Valid=745, Invalid=5417, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 17:14:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90208 states. [2021-06-05 17:14:53,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90208 to 51198. [2021-06-05 17:14:53,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51198 states, 51197 states have (on average 3.875871633103502) internal successors, (198433), 51197 states have internal predecessors, (198433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:53,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51198 states to 51198 states and 198433 transitions. [2021-06-05 17:14:53,368 INFO L78 Accepts]: Start accepts. Automaton has 51198 states and 198433 transitions. Word has length 30 [2021-06-05 17:14:53,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:14:53,368 INFO L482 AbstractCegarLoop]: Abstraction has 51198 states and 198433 transitions. [2021-06-05 17:14:53,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:53,368 INFO L276 IsEmpty]: Start isEmpty. Operand 51198 states and 198433 transitions. [2021-06-05 17:14:53,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:14:53,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:14:53,460 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:14:53,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:14:53,661 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:14:53,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:14:53,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1442848042, now seen corresponding path program 203 times [2021-06-05 17:14:53,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:14:53,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888825493] [2021-06-05 17:14:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:14:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:14:53,941 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-06-05 17:14:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:54,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:14:54,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888825493] [2021-06-05 17:14:54,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888825493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:54,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381697146] [2021-06-05 17:14:54,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:14:54,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:14:54,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:14:54,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:14:54,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:14:54,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:54,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:54,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:54,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:54,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:54,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:54,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:14:54,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:14:54,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 55 [2021-06-05 17:14:54,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:14:54,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:14:54,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:14:54,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:22 [2021-06-05 17:14:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:54,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381697146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:54,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:14:54,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 17:14:54,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646722435] [2021-06-05 17:14:54,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:14:54,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:14:54,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:14:54,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:14:54,364 INFO L87 Difference]: Start difference. First operand 51198 states and 198433 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:59,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:14:59,992 INFO L93 Difference]: Finished difference Result 89164 states and 331673 transitions. [2021-06-05 17:14:59,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 17:14:59,992 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:14:59,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:15:00,328 INFO L225 Difference]: With dead ends: 89164 [2021-06-05 17:15:00,328 INFO L226 Difference]: Without dead ends: 89134 [2021-06-05 17:15:00,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2803 ImplicationChecksByTransitivity, 3897.5ms TimeCoverageRelationStatistics Valid=760, Invalid=7796, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 17:15:00,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89134 states. [2021-06-05 17:15:01,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89134 to 51198. [2021-06-05 17:15:01,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51198 states, 51197 states have (on average 3.875754438736645) internal successors, (198427), 51197 states have internal predecessors, (198427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:01,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51198 states to 51198 states and 198427 transitions. [2021-06-05 17:15:01,765 INFO L78 Accepts]: Start accepts. Automaton has 51198 states and 198427 transitions. Word has length 30 [2021-06-05 17:15:01,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:15:01,766 INFO L482 AbstractCegarLoop]: Abstraction has 51198 states and 198427 transitions. [2021-06-05 17:15:01,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand 51198 states and 198427 transitions. [2021-06-05 17:15:01,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:15:01,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:15:01,850 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:15:02,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:15:02,050 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:15:02,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:15:02,051 INFO L82 PathProgramCache]: Analyzing trace with hash -703322718, now seen corresponding path program 204 times [2021-06-05 17:15:02,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:15:02,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855767159] [2021-06-05 17:15:02,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:15:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:15:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:15:02,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:15:02,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855767159] [2021-06-05 17:15:02,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855767159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:02,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840947725] [2021-06-05 17:15:02,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:15:02,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:15:02,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:15:02,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:15:02,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:15:02,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:15:02,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:15:02,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:15:02,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:15:02,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:15:02,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:15:02,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 17:15:02,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:15:02,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:15:02,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:15:02,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 17:15:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:15:02,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840947725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:02,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:15:02,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:15:02,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844433203] [2021-06-05 17:15:02,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:15:02,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:15:02,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:15:02,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:15:02,518 INFO L87 Difference]: Start difference. First operand 51198 states and 198427 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:03,876 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-06-05 17:15:04,285 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-06-05 17:15:07,391 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-06-05 17:15:07,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:15:07,854 INFO L93 Difference]: Finished difference Result 100466 states and 369497 transitions. [2021-06-05 17:15:07,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 17:15:07,854 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:15:07,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:15:08,140 INFO L225 Difference]: With dead ends: 100466 [2021-06-05 17:15:08,140 INFO L226 Difference]: Without dead ends: 100421 [2021-06-05 17:15:08,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2333 ImplicationChecksByTransitivity, 4134.1ms TimeCoverageRelationStatistics Valid=949, Invalid=6191, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 17:15:08,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100421 states. [2021-06-05 17:15:09,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100421 to 51219. [2021-06-05 17:15:09,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51219 states, 51218 states have (on average 3.875727283376938) internal successors, (198507), 51218 states have internal predecessors, (198507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:09,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51219 states to 51219 states and 198507 transitions. [2021-06-05 17:15:09,871 INFO L78 Accepts]: Start accepts. Automaton has 51219 states and 198507 transitions. Word has length 30 [2021-06-05 17:15:09,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:15:09,871 INFO L482 AbstractCegarLoop]: Abstraction has 51219 states and 198507 transitions. [2021-06-05 17:15:09,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:09,871 INFO L276 IsEmpty]: Start isEmpty. Operand 51219 states and 198507 transitions. [2021-06-05 17:15:09,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:15:09,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:15:09,950 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:15:10,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:15:10,151 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:15:10,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:15:10,151 INFO L82 PathProgramCache]: Analyzing trace with hash 103853306, now seen corresponding path program 205 times [2021-06-05 17:15:10,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:15:10,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888948777] [2021-06-05 17:15:10,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:15:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:15:10,614 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 17:15:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:15:10,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:15:10,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888948777] [2021-06-05 17:15:10,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888948777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:10,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838227692] [2021-06-05 17:15:10,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:15:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:15:10,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:15:10,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:15:10,904 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-05 17:15:10,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-06-05 17:15:10,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:15:10,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:15:10,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:15:10,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-05 17:15:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:15:10,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838227692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:10,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:15:10,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:15:10,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114685801] [2021-06-05 17:15:10,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:15:10,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:15:10,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:15:10,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:15:10,927 INFO L87 Difference]: Start difference. First operand 51219 states and 198507 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:13,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:15:13,441 INFO L93 Difference]: Finished difference Result 72664 states and 274266 transitions. [2021-06-05 17:15:13,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 17:15:13,441 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:15:13,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:15:13,633 INFO L225 Difference]: With dead ends: 72664 [2021-06-05 17:15:13,633 INFO L226 Difference]: Without dead ends: 72586 [2021-06-05 17:15:13,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1774.7ms TimeCoverageRelationStatistics Valid=538, Invalid=1718, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:15:13,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72586 states. [2021-06-05 17:15:14,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72586 to 51288. [2021-06-05 17:15:14,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51288 states, 51287 states have (on average 3.8757969855908905) internal successors, (198778), 51287 states have internal predecessors, (198778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51288 states to 51288 states and 198778 transitions. [2021-06-05 17:15:15,063 INFO L78 Accepts]: Start accepts. Automaton has 51288 states and 198778 transitions. Word has length 30 [2021-06-05 17:15:15,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:15:15,063 INFO L482 AbstractCegarLoop]: Abstraction has 51288 states and 198778 transitions. [2021-06-05 17:15:15,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:15,063 INFO L276 IsEmpty]: Start isEmpty. Operand 51288 states and 198778 transitions. [2021-06-05 17:15:15,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:15:15,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:15:15,154 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:15:15,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-06-05 17:15:15,355 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:15:15,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:15:15,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1693723682, now seen corresponding path program 206 times [2021-06-05 17:15:15,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:15:15,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440374743] [2021-06-05 17:15:15,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:15:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:15:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:15:15,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:15:15,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440374743] [2021-06-05 17:15:15,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440374743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:15,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474932474] [2021-06-05 17:15:15,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:15:15,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:15:15,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:15:15,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:15:15,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:15:15,779 INFO L354 Elim1Store]: treesize reduction 41, result has 16.3 percent of original size [2021-06-05 17:15:15,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 66 [2021-06-05 17:15:15,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:15:15,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:15:15,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:15:15,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:88, output treesize:17 [2021-06-05 17:15:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:15:15,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474932474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:15,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:15:15,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 17:15:15,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672648297] [2021-06-05 17:15:15,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:15:15,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:15:15,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:15:15,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:15:15,829 INFO L87 Difference]: Start difference. First operand 51288 states and 198778 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:19,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:15:19,580 INFO L93 Difference]: Finished difference Result 74850 states and 281175 transitions. [2021-06-05 17:15:19,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:15:19,581 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:15:19,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:15:19,791 INFO L225 Difference]: With dead ends: 74850 [2021-06-05 17:15:19,791 INFO L226 Difference]: Without dead ends: 74784 [2021-06-05 17:15:19,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 2599.7ms TimeCoverageRelationStatistics Valid=630, Invalid=2792, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:15:19,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74784 states. [2021-06-05 17:15:21,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74784 to 51286. [2021-06-05 17:15:21,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51286 states, 51285 states have (on average 3.8756556498001364) internal successors, (198763), 51285 states have internal predecessors, (198763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:21,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51286 states to 51286 states and 198763 transitions. [2021-06-05 17:15:21,429 INFO L78 Accepts]: Start accepts. Automaton has 51286 states and 198763 transitions. Word has length 30 [2021-06-05 17:15:21,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:15:21,429 INFO L482 AbstractCegarLoop]: Abstraction has 51286 states and 198763 transitions. [2021-06-05 17:15:21,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:21,430 INFO L276 IsEmpty]: Start isEmpty. Operand 51286 states and 198763 transitions. [2021-06-05 17:15:21,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:15:21,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:15:21,510 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:15:21,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 17:15:21,710 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:15:21,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:15:21,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2086344974, now seen corresponding path program 207 times [2021-06-05 17:15:21,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:15:21,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747821848] [2021-06-05 17:15:21,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:15:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:15:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:15:21,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:15:21,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747821848] [2021-06-05 17:15:21,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747821848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:21,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950997888] [2021-06-05 17:15:21,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:15:21,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:15:21,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:15:21,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 17:15:21,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:15:22,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:15:22,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:15:22,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 79 [2021-06-05 17:15:22,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:15:22,695 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 73 [2021-06-05 17:15:22,696 INFO L628 ElimStorePlain]: treesize reduction 588, result has 22.5 percent of original size [2021-06-05 17:15:22,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:15:22,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:756 [2021-06-05 17:15:23,096 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2021-06-05 17:15:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:15:23,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950997888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:23,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:15:23,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-06-05 17:15:23,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302022655] [2021-06-05 17:15:23,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 17:15:23,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:15:23,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 17:15:23,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:15:23,422 INFO L87 Difference]: Start difference. First operand 51286 states and 198763 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:24,248 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 44 [2021-06-05 17:15:24,396 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 39 [2021-06-05 17:15:28,853 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 17:15:29,118 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-06-05 17:15:29,328 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-05 17:15:29,465 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 36 [2021-06-05 17:15:29,702 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-06-05 17:15:30,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:15:30,198 INFO L93 Difference]: Finished difference Result 99242 states and 366200 transitions. [2021-06-05 17:15:30,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 17:15:30,198 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:15:30,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:15:30,459 INFO L225 Difference]: With dead ends: 99242 [2021-06-05 17:15:30,459 INFO L226 Difference]: Without dead ends: 99212 [2021-06-05 17:15:30,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 5576.4ms TimeCoverageRelationStatistics Valid=882, Invalid=6774, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 17:15:30,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99212 states. [2021-06-05 17:15:31,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99212 to 51295. [2021-06-05 17:15:31,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51295 states, 51294 states have (on average 3.875560494404804) internal successors, (198793), 51294 states have internal predecessors, (198793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:32,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51295 states to 51295 states and 198793 transitions. [2021-06-05 17:15:32,028 INFO L78 Accepts]: Start accepts. Automaton has 51295 states and 198793 transitions. Word has length 30 [2021-06-05 17:15:32,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:15:32,028 INFO L482 AbstractCegarLoop]: Abstraction has 51295 states and 198793 transitions. [2021-06-05 17:15:32,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:32,028 INFO L276 IsEmpty]: Start isEmpty. Operand 51295 states and 198793 transitions. [2021-06-05 17:15:32,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:15:32,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:15:32,111 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:15:32,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:15:32,311 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:15:32,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:15:32,312 INFO L82 PathProgramCache]: Analyzing trace with hash 714714600, now seen corresponding path program 208 times [2021-06-05 17:15:32,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:15:32,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352297893] [2021-06-05 17:15:32,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:15:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:15:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:15:32,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:15:32,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352297893] [2021-06-05 17:15:32,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352297893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:32,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386613113] [2021-06-05 17:15:32,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:15:32,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:15:32,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:15:32,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:15:32,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:15:32,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:15:32,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:15:32,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:15:32,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:15:32,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:15:32,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:15:32,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 17:15:32,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:15:32,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:15:32,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:15:32,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 17:15:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:15:32,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386613113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:32,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:15:32,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:15:32,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393937308] [2021-06-05 17:15:32,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:15:32,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:15:32,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:15:32,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:15:32,767 INFO L87 Difference]: Start difference. First operand 51295 states and 198793 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:33,778 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-06-05 17:15:37,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:15:37,224 INFO L93 Difference]: Finished difference Result 88709 states and 330422 transitions. [2021-06-05 17:15:37,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 17:15:37,225 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:15:37,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:15:37,502 INFO L225 Difference]: With dead ends: 88709 [2021-06-05 17:15:37,502 INFO L226 Difference]: Without dead ends: 88679 [2021-06-05 17:15:37,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 3112.1ms TimeCoverageRelationStatistics Valid=694, Invalid=4276, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 17:15:37,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88679 states. [2021-06-05 17:15:38,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88679 to 51308. [2021-06-05 17:15:38,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51308 states, 51307 states have (on average 3.8756504960336797) internal successors, (198848), 51307 states have internal predecessors, (198848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:39,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51308 states to 51308 states and 198848 transitions. [2021-06-05 17:15:39,148 INFO L78 Accepts]: Start accepts. Automaton has 51308 states and 198848 transitions. Word has length 30 [2021-06-05 17:15:39,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:15:39,148 INFO L482 AbstractCegarLoop]: Abstraction has 51308 states and 198848 transitions. [2021-06-05 17:15:39,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:39,148 INFO L276 IsEmpty]: Start isEmpty. Operand 51308 states and 198848 transitions. [2021-06-05 17:15:39,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:15:39,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:15:39,230 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:15:39,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable621,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:15:39,431 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:15:39,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:15:39,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1077811610, now seen corresponding path program 209 times [2021-06-05 17:15:39,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:15:39,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519960125] [2021-06-05 17:15:39,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:15:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:15:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:15:39,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:15:39,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519960125] [2021-06-05 17:15:39,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519960125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:39,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641965204] [2021-06-05 17:15:39,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:15:39,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:15:39,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:15:39,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:15:39,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:15:39,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:15:39,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:15:39,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:15:39,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:15:39,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:15:39,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:15:39,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 17:15:39,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:15:39,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:15:39,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:15:39,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:5 [2021-06-05 17:15:40,006 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:15:40,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641965204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:40,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:15:40,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:15:40,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938746912] [2021-06-05 17:15:40,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:15:40,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:15:40,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:15:40,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:15:40,007 INFO L87 Difference]: Start difference. First operand 51308 states and 198848 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:40,498 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-05 17:15:44,121 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 17:15:45,069 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 17:15:45,343 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-06-05 17:15:45,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:15:45,906 INFO L93 Difference]: Finished difference Result 100753 states and 371531 transitions. [2021-06-05 17:15:45,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 17:15:45,907 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:15:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:15:46,194 INFO L225 Difference]: With dead ends: 100753 [2021-06-05 17:15:46,194 INFO L226 Difference]: Without dead ends: 100723 [2021-06-05 17:15:46,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 4258.7ms TimeCoverageRelationStatistics Valid=829, Invalid=4721, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 17:15:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100723 states. [2021-06-05 17:15:47,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100723 to 51325. [2021-06-05 17:15:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51325 states, 51324 states have (on average 3.875944977008807) internal successors, (198929), 51324 states have internal predecessors, (198929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:48,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51325 states to 51325 states and 198929 transitions. [2021-06-05 17:15:48,146 INFO L78 Accepts]: Start accepts. Automaton has 51325 states and 198929 transitions. Word has length 30 [2021-06-05 17:15:48,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:15:48,146 INFO L482 AbstractCegarLoop]: Abstraction has 51325 states and 198929 transitions. [2021-06-05 17:15:48,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:48,146 INFO L276 IsEmpty]: Start isEmpty. Operand 51325 states and 198929 transitions. [2021-06-05 17:15:48,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:15:48,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:15:48,229 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:15:48,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-06-05 17:15:48,430 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:15:48,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:15:48,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1599622906, now seen corresponding path program 210 times [2021-06-05 17:15:48,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:15:48,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730570144] [2021-06-05 17:15:48,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:15:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:15:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:15:48,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:15:48,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730570144] [2021-06-05 17:15:48,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730570144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:48,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455183792] [2021-06-05 17:15:48,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:15:48,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:15:48,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:15:48,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 17:15:48,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:15:48,934 INFO L354 Elim1Store]: treesize reduction 16, result has 82.0 percent of original size [2021-06-05 17:15:48,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 116 treesize of output 131 [2021-06-05 17:15:49,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:15:49,664 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 93 [2021-06-05 17:15:49,665 INFO L628 ElimStorePlain]: treesize reduction 561, result has 33.1 percent of original size [2021-06-05 17:15:49,902 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 140 [2021-06-05 17:15:49,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:15:49,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:129, output treesize:1483 [2021-06-05 17:15:50,849 WARN L205 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 100 [2021-06-05 17:15:51,130 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2021-06-05 17:15:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:15:51,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455183792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:51,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:15:51,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-06-05 17:15:51,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047034221] [2021-06-05 17:15:51,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 17:15:51,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:15:51,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 17:15:51,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:15:51,352 INFO L87 Difference]: Start difference. First operand 51325 states and 198929 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:52,054 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-06-05 17:15:53,456 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 128 [2021-06-05 17:15:57,683 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 104 [2021-06-05 17:15:58,330 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-06-05 17:15:58,756 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 131 [2021-06-05 17:15:58,982 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 69 [2021-06-05 17:15:59,277 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 96 [2021-06-05 17:15:59,639 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 117 [2021-06-05 17:16:00,120 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 127 [2021-06-05 17:16:00,661 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 116 [2021-06-05 17:16:01,002 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 68 [2021-06-05 17:16:01,260 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 79 [2021-06-05 17:16:01,556 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 61 [2021-06-05 17:16:01,881 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 88 [2021-06-05 17:16:02,183 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 93 [2021-06-05 17:16:02,635 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 80 [2021-06-05 17:16:03,111 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 87 [2021-06-05 17:16:03,566 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 93 [2021-06-05 17:16:04,149 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 99 [2021-06-05 17:16:04,688 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 100 [2021-06-05 17:16:05,296 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 100 [2021-06-05 17:16:05,641 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 99 [2021-06-05 17:16:05,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:16:05,729 INFO L93 Difference]: Finished difference Result 98216 states and 365043 transitions. [2021-06-05 17:16:05,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 17:16:05,730 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:16:05,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:16:05,975 INFO L225 Difference]: With dead ends: 98216 [2021-06-05 17:16:05,975 INFO L226 Difference]: Without dead ends: 98186 [2021-06-05 17:16:05,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3727 ImplicationChecksByTransitivity, 13239.1ms TimeCoverageRelationStatistics Valid=1403, Invalid=9939, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 17:16:06,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98186 states. [2021-06-05 17:16:07,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98186 to 51329. [2021-06-05 17:16:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51329 states, 51328 states have (on average 3.8760325748129674) internal successors, (198949), 51328 states have internal predecessors, (198949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:07,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51329 states to 51329 states and 198949 transitions. [2021-06-05 17:16:07,644 INFO L78 Accepts]: Start accepts. Automaton has 51329 states and 198949 transitions. Word has length 30 [2021-06-05 17:16:07,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:16:07,644 INFO L482 AbstractCegarLoop]: Abstraction has 51329 states and 198949 transitions. [2021-06-05 17:16:07,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:07,644 INFO L276 IsEmpty]: Start isEmpty. Operand 51329 states and 198949 transitions. [2021-06-05 17:16:07,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:16:07,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:16:07,729 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:16:07,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:16:07,929 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:16:07,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:16:07,930 INFO L82 PathProgramCache]: Analyzing trace with hash -647796388, now seen corresponding path program 211 times [2021-06-05 17:16:07,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:16:07,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234586643] [2021-06-05 17:16:07,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:16:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:08,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:16:08,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234586643] [2021-06-05 17:16:08,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234586643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:08,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31818201] [2021-06-05 17:16:08,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:16:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:08,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:16:08,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:16:08,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:08,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:08,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:08,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:08,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:08,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:08,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:16:08,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:16:08,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 41 [2021-06-05 17:16:08,368 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:16:08,381 INFO L628 ElimStorePlain]: treesize reduction 21, result has 47.5 percent of original size [2021-06-05 17:16:08,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:16:08,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:19 [2021-06-05 17:16:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:08,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31818201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:08,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:16:08,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 17:16:08,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495279064] [2021-06-05 17:16:08,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:16:08,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:16:08,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:16:08,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:16:08,425 INFO L87 Difference]: Start difference. First operand 51329 states and 198949 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:09,321 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-06-05 17:16:09,927 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-05 17:16:12,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:16:12,313 INFO L93 Difference]: Finished difference Result 75448 states and 283001 transitions. [2021-06-05 17:16:12,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 17:16:12,313 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:16:12,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:16:12,540 INFO L225 Difference]: With dead ends: 75448 [2021-06-05 17:16:12,540 INFO L226 Difference]: Without dead ends: 75418 [2021-06-05 17:16:12,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 2953.6ms TimeCoverageRelationStatistics Valid=599, Invalid=3183, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 17:16:12,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75418 states. [2021-06-05 17:16:13,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75418 to 51341. [2021-06-05 17:16:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51341 states, 51340 states have (on average 3.8762173743669655) internal successors, (199005), 51340 states have internal predecessors, (199005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:13,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51341 states to 51341 states and 199005 transitions. [2021-06-05 17:16:13,967 INFO L78 Accepts]: Start accepts. Automaton has 51341 states and 199005 transitions. Word has length 30 [2021-06-05 17:16:13,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:16:13,967 INFO L482 AbstractCegarLoop]: Abstraction has 51341 states and 199005 transitions. [2021-06-05 17:16:13,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:13,967 INFO L276 IsEmpty]: Start isEmpty. Operand 51341 states and 199005 transitions. [2021-06-05 17:16:14,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:16:14,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:16:14,052 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:16:14,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2021-06-05 17:16:14,253 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:16:14,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:16:14,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1412477524, now seen corresponding path program 212 times [2021-06-05 17:16:14,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:16:14,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395304887] [2021-06-05 17:16:14,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:16:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:14,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:16:14,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395304887] [2021-06-05 17:16:14,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395304887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:14,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561900205] [2021-06-05 17:16:14,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:16:14,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:16:14,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:16:14,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:16:14,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:16:14,701 INFO L354 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2021-06-05 17:16:14,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 132 treesize of output 78 [2021-06-05 17:16:14,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:16:14,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:16:14,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:16:14,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:132, output treesize:5 [2021-06-05 17:16:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:14,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561900205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:14,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:16:14,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:16:14,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843546869] [2021-06-05 17:16:14,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:16:14,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:16:14,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:16:14,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:16:14,725 INFO L87 Difference]: Start difference. First operand 51341 states and 199005 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:16,009 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-06-05 17:16:18,423 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2021-06-05 17:16:19,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:16:19,617 INFO L93 Difference]: Finished difference Result 89359 states and 332380 transitions. [2021-06-05 17:16:19,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 17:16:19,618 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:16:19,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:16:19,862 INFO L225 Difference]: With dead ends: 89359 [2021-06-05 17:16:19,862 INFO L226 Difference]: Without dead ends: 89329 [2021-06-05 17:16:19,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 3376.7ms TimeCoverageRelationStatistics Valid=736, Invalid=4964, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 17:16:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89329 states. [2021-06-05 17:16:21,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89329 to 51356. [2021-06-05 17:16:21,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51356 states, 51355 states have (on average 3.8760977509492744) internal successors, (199057), 51355 states have internal predecessors, (199057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:21,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51356 states to 51356 states and 199057 transitions. [2021-06-05 17:16:21,376 INFO L78 Accepts]: Start accepts. Automaton has 51356 states and 199057 transitions. Word has length 30 [2021-06-05 17:16:21,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:16:21,376 INFO L482 AbstractCegarLoop]: Abstraction has 51356 states and 199057 transitions. [2021-06-05 17:16:21,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:21,377 INFO L276 IsEmpty]: Start isEmpty. Operand 51356 states and 199057 transitions. [2021-06-05 17:16:21,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:16:21,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:16:21,465 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:16:21,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable679,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:16:21,681 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:16:21,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:16:21,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1672859506, now seen corresponding path program 91 times [2021-06-05 17:16:21,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:16:21,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716274265] [2021-06-05 17:16:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:16:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:22,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:16:22,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716274265] [2021-06-05 17:16:22,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716274265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:22,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893247166] [2021-06-05 17:16:22,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:16:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:22,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:16:22,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:16:22,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:22,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:22,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:16:22,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:22,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:22,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:16:22,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:16:22,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 17:16:22,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:16:22,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:16:22,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:16:22,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:7 [2021-06-05 17:16:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:22,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893247166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:22,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:16:22,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-06-05 17:16:22,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116184101] [2021-06-05 17:16:22,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:16:22,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:16:22,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:16:22,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:16:22,263 INFO L87 Difference]: Start difference. First operand 51356 states and 199057 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:23,716 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-06-05 17:16:24,440 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 52 [2021-06-05 17:16:24,803 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-05 17:16:25,729 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-06-05 17:16:25,933 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-06-05 17:16:26,092 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-05 17:16:26,227 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-06-05 17:16:26,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:16:26,868 INFO L93 Difference]: Finished difference Result 65015 states and 244705 transitions. [2021-06-05 17:16:26,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 17:16:26,869 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:16:26,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:16:27,066 INFO L225 Difference]: With dead ends: 65015 [2021-06-05 17:16:27,067 INFO L226 Difference]: Without dead ends: 65000 [2021-06-05 17:16:27,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 3771.3ms TimeCoverageRelationStatistics Valid=667, Invalid=3623, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 17:16:27,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65000 states. [2021-06-05 17:16:28,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65000 to 51356. [2021-06-05 17:16:28,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51356 states, 51355 states have (on average 3.8760977509492744) internal successors, (199057), 51355 states have internal predecessors, (199057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:28,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51356 states to 51356 states and 199057 transitions. [2021-06-05 17:16:28,357 INFO L78 Accepts]: Start accepts. Automaton has 51356 states and 199057 transitions. Word has length 30 [2021-06-05 17:16:28,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:16:28,357 INFO L482 AbstractCegarLoop]: Abstraction has 51356 states and 199057 transitions. [2021-06-05 17:16:28,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:28,357 INFO L276 IsEmpty]: Start isEmpty. Operand 51356 states and 199057 transitions. [2021-06-05 17:16:28,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:16:28,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:16:28,447 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:16:28,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:16:28,648 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:16:28,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:16:28,648 INFO L82 PathProgramCache]: Analyzing trace with hash -266679050, now seen corresponding path program 92 times [2021-06-05 17:16:28,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:16:28,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841988764] [2021-06-05 17:16:28,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:16:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:28,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:16:28,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841988764] [2021-06-05 17:16:28,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841988764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:28,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774168999] [2021-06-05 17:16:28,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:16:29,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:16:29,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:16:29,003 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 17:16:29,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:16:29,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:29,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:29,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:29,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:29,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:16:29,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:29,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:16:29,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:16:29,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-06-05 17:16:29,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:16:29,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:16:29,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:16:29,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:16 [2021-06-05 17:16:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:29,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774168999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:29,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:16:29,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:16:29,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063488533] [2021-06-05 17:16:29,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:16:29,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:16:29,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:16:29,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:16:29,281 INFO L87 Difference]: Start difference. First operand 51356 states and 199057 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:31,247 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-06-05 17:16:32,411 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-05 17:16:32,650 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-06-05 17:16:33,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:16:33,373 INFO L93 Difference]: Finished difference Result 65322 states and 245610 transitions. [2021-06-05 17:16:33,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 17:16:33,373 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:16:33,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:16:33,549 INFO L225 Difference]: With dead ends: 65322 [2021-06-05 17:16:33,549 INFO L226 Difference]: Without dead ends: 65292 [2021-06-05 17:16:33,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 3199.8ms TimeCoverageRelationStatistics Valid=705, Invalid=3585, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 17:16:33,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65292 states. [2021-06-05 17:16:34,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65292 to 51363. [2021-06-05 17:16:34,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51363 states, 51362 states have (on average 3.876211985514583) internal successors, (199090), 51362 states have internal predecessors, (199090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:34,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51363 states to 51363 states and 199090 transitions. [2021-06-05 17:16:34,840 INFO L78 Accepts]: Start accepts. Automaton has 51363 states and 199090 transitions. Word has length 30 [2021-06-05 17:16:34,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:16:34,840 INFO L482 AbstractCegarLoop]: Abstraction has 51363 states and 199090 transitions. [2021-06-05 17:16:34,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:34,840 INFO L276 IsEmpty]: Start isEmpty. Operand 51363 states and 199090 transitions. [2021-06-05 17:16:34,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:16:34,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:16:34,920 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:16:35,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable681 [2021-06-05 17:16:35,120 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:16:35,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:16:35,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1242997894, now seen corresponding path program 93 times [2021-06-05 17:16:35,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:16:35,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051663333] [2021-06-05 17:16:35,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:16:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:35,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:16:35,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051663333] [2021-06-05 17:16:35,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051663333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:35,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628587534] [2021-06-05 17:16:35,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:16:35,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:16:35,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:16:35,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 17:16:35,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:16:35,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:35,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:35,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:35,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:35,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:35,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:35,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:35,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:35,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:35,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:16:35,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 75 [2021-06-05 17:16:35,716 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:16:35,736 INFO L628 ElimStorePlain]: treesize reduction 23, result has 58.2 percent of original size [2021-06-05 17:16:35,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:16:35,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:46 [2021-06-05 17:16:35,800 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:35,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628587534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:35,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:16:35,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 17:16:35,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269753186] [2021-06-05 17:16:35,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 17:16:35,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:16:35,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 17:16:35,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:16:35,801 INFO L87 Difference]: Start difference. First operand 51363 states and 199090 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:40,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:16:40,275 INFO L93 Difference]: Finished difference Result 52142 states and 201228 transitions. [2021-06-05 17:16:40,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:16:40,276 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:16:40,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:16:40,399 INFO L225 Difference]: With dead ends: 52142 [2021-06-05 17:16:40,399 INFO L226 Difference]: Without dead ends: 52127 [2021-06-05 17:16:40,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 3357.7ms TimeCoverageRelationStatistics Valid=643, Invalid=4907, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 17:16:40,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52127 states. [2021-06-05 17:16:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52127 to 51368. [2021-06-05 17:16:41,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51368 states, 51367 states have (on average 3.876107228376195) internal successors, (199104), 51367 states have internal predecessors, (199104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:41,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51368 states to 51368 states and 199104 transitions. [2021-06-05 17:16:41,578 INFO L78 Accepts]: Start accepts. Automaton has 51368 states and 199104 transitions. Word has length 30 [2021-06-05 17:16:41,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:16:41,578 INFO L482 AbstractCegarLoop]: Abstraction has 51368 states and 199104 transitions. [2021-06-05 17:16:41,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:41,578 INFO L276 IsEmpty]: Start isEmpty. Operand 51368 states and 199104 transitions. [2021-06-05 17:16:41,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:16:41,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:16:41,655 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:16:41,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:16:41,856 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:16:41,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:16:41,856 INFO L82 PathProgramCache]: Analyzing trace with hash 319742902, now seen corresponding path program 213 times [2021-06-05 17:16:41,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:16:41,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937206027] [2021-06-05 17:16:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:16:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:42,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:16:42,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937206027] [2021-06-05 17:16:42,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937206027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:42,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232172364] [2021-06-05 17:16:42,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:16:42,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:16:42,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:16:42,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 17:16:42,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:16:42,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:42,285 INFO L354 Elim1Store]: treesize reduction 34, result has 57.0 percent of original size [2021-06-05 17:16:42,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 132 treesize of output 116 [2021-06-05 17:16:42,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:16:42,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:16:42,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:16:42,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:140, output treesize:37 [2021-06-05 17:16:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:42,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232172364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:42,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:16:42,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:16:42,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897746738] [2021-06-05 17:16:42,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:16:42,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:16:42,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:16:42,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:16:42,356 INFO L87 Difference]: Start difference. First operand 51368 states and 199104 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:43,843 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-05 17:16:45,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:16:45,335 INFO L93 Difference]: Finished difference Result 96060 states and 356274 transitions. [2021-06-05 17:16:45,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 17:16:45,335 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:16:45,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:16:45,584 INFO L225 Difference]: With dead ends: 96060 [2021-06-05 17:16:45,585 INFO L226 Difference]: Without dead ends: 96030 [2021-06-05 17:16:45,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1971.2ms TimeCoverageRelationStatistics Valid=427, Invalid=3113, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:16:45,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96030 states. [2021-06-05 17:16:47,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96030 to 51366. [2021-06-05 17:16:47,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51366 states, 51365 states have (on average 3.8760439988318893) internal successors, (199093), 51365 states have internal predecessors, (199093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:47,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51366 states to 51366 states and 199093 transitions. [2021-06-05 17:16:47,414 INFO L78 Accepts]: Start accepts. Automaton has 51366 states and 199093 transitions. Word has length 30 [2021-06-05 17:16:47,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:16:47,414 INFO L482 AbstractCegarLoop]: Abstraction has 51366 states and 199093 transitions. [2021-06-05 17:16:47,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:47,414 INFO L276 IsEmpty]: Start isEmpty. Operand 51366 states and 199093 transitions. [2021-06-05 17:16:47,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:16:47,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:16:47,503 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:16:47,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:16:47,703 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:16:47,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:16:47,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1522055270, now seen corresponding path program 214 times [2021-06-05 17:16:47,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:16:47,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862059654] [2021-06-05 17:16:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:16:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:47,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:16:47,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862059654] [2021-06-05 17:16:47,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862059654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:47,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306004993] [2021-06-05 17:16:47,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:16:47,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:16:47,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:16:47,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:16:47,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:16:48,143 INFO L354 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2021-06-05 17:16:48,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 132 treesize of output 78 [2021-06-05 17:16:48,145 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:16:48,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:16:48,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:16:48,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:132, output treesize:5 [2021-06-05 17:16:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:48,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306004993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:48,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:16:48,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:16:48,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677029604] [2021-06-05 17:16:48,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:16:48,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:16:48,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:16:48,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:16:48,169 INFO L87 Difference]: Start difference. First operand 51366 states and 199093 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:53,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:16:53,084 INFO L93 Difference]: Finished difference Result 96170 states and 356770 transitions. [2021-06-05 17:16:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 17:16:53,084 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:16:53,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:16:53,334 INFO L225 Difference]: With dead ends: 96170 [2021-06-05 17:16:53,334 INFO L226 Difference]: Without dead ends: 96110 [2021-06-05 17:16:53,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2470 ImplicationChecksByTransitivity, 3364.0ms TimeCoverageRelationStatistics Valid=997, Invalid=6313, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 17:16:53,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96110 states. [2021-06-05 17:16:54,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96110 to 51441. [2021-06-05 17:16:54,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51441 states, 51440 states have (on average 3.877293934681182) internal successors, (199448), 51440 states have internal predecessors, (199448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51441 states to 51441 states and 199448 transitions. [2021-06-05 17:16:54,945 INFO L78 Accepts]: Start accepts. Automaton has 51441 states and 199448 transitions. Word has length 30 [2021-06-05 17:16:54,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:16:54,945 INFO L482 AbstractCegarLoop]: Abstraction has 51441 states and 199448 transitions. [2021-06-05 17:16:54,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:54,945 INFO L276 IsEmpty]: Start isEmpty. Operand 51441 states and 199448 transitions. [2021-06-05 17:16:55,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:16:55,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:16:55,025 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:16:55,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable703,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:16:55,226 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:16:55,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:16:55,226 INFO L82 PathProgramCache]: Analyzing trace with hash -939263374, now seen corresponding path program 215 times [2021-06-05 17:16:55,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:16:55,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14683753] [2021-06-05 17:16:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:16:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:55,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:16:55,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14683753] [2021-06-05 17:16:55,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14683753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:55,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179385787] [2021-06-05 17:16:55,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:16:55,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:16:55,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:16:55,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:16:55,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:16:55,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:55,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:55,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:55,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:16:55,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:16:55,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 43 [2021-06-05 17:16:55,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:16:55,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:16:55,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:16:55,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:21 [2021-06-05 17:16:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:55,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179385787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:55,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:16:55,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:16:55,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134956662] [2021-06-05 17:16:55,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:16:55,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:16:55,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:16:55,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:16:55,684 INFO L87 Difference]: Start difference. First operand 51441 states and 199448 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:56,151 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 17:16:59,389 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-06-05 17:17:01,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:17:01,078 INFO L93 Difference]: Finished difference Result 98045 states and 363673 transitions. [2021-06-05 17:17:01,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 17:17:01,078 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:17:01,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:17:01,334 INFO L225 Difference]: With dead ends: 98045 [2021-06-05 17:17:01,334 INFO L226 Difference]: Without dead ends: 97985 [2021-06-05 17:17:01,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 3819.9ms TimeCoverageRelationStatistics Valid=1077, Invalid=6063, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 17:17:01,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97985 states. [2021-06-05 17:17:02,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97985 to 51457. [2021-06-05 17:17:02,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51457 states, 51456 states have (on average 3.8776819029850746) internal successors, (199530), 51456 states have internal predecessors, (199530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:03,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51457 states to 51457 states and 199530 transitions. [2021-06-05 17:17:03,126 INFO L78 Accepts]: Start accepts. Automaton has 51457 states and 199530 transitions. Word has length 30 [2021-06-05 17:17:03,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:17:03,126 INFO L482 AbstractCegarLoop]: Abstraction has 51457 states and 199530 transitions. [2021-06-05 17:17:03,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:03,126 INFO L276 IsEmpty]: Start isEmpty. Operand 51457 states and 199530 transitions. [2021-06-05 17:17:03,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:17:03,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:17:03,209 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:17:03,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable704 [2021-06-05 17:17:03,409 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:17:03,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:17:03,409 INFO L82 PathProgramCache]: Analyzing trace with hash -298347338, now seen corresponding path program 216 times [2021-06-05 17:17:03,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:17:03,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19792625] [2021-06-05 17:17:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:17:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:17:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:17:03,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:17:03,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19792625] [2021-06-05 17:17:03,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19792625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:03,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260253280] [2021-06-05 17:17:03,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:17:03,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:17:03,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:17:03,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 17:17:03,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:17:03,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:17:03,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:17:03,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:17:03,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:17:03,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:17:03,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 87 [2021-06-05 17:17:03,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:17:03,902 INFO L628 ElimStorePlain]: treesize reduction 283, result has 8.7 percent of original size [2021-06-05 17:17:03,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:17:03,902 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:27 [2021-06-05 17:17:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:17:03,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260253280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:03,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:17:03,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:17:03,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273124552] [2021-06-05 17:17:03,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:17:03,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:17:03,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:17:03,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:17:03,969 INFO L87 Difference]: Start difference. First operand 51457 states and 199530 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:05,521 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-06-05 17:17:07,883 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-06-05 17:17:09,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:17:09,947 INFO L93 Difference]: Finished difference Result 88720 states and 330726 transitions. [2021-06-05 17:17:09,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 17:17:09,948 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:17:09,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:17:10,192 INFO L225 Difference]: With dead ends: 88720 [2021-06-05 17:17:10,192 INFO L226 Difference]: Without dead ends: 88705 [2021-06-05 17:17:10,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2686 ImplicationChecksByTransitivity, 4359.1ms TimeCoverageRelationStatistics Valid=917, Invalid=7455, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 17:17:10,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88705 states. [2021-06-05 17:17:11,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88705 to 51452. [2021-06-05 17:17:11,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51452 states, 51451 states have (on average 3.8778449398456782) internal successors, (199519), 51451 states have internal predecessors, (199519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51452 states to 51452 states and 199519 transitions. [2021-06-05 17:17:11,732 INFO L78 Accepts]: Start accepts. Automaton has 51452 states and 199519 transitions. Word has length 30 [2021-06-05 17:17:11,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:17:11,733 INFO L482 AbstractCegarLoop]: Abstraction has 51452 states and 199519 transitions. [2021-06-05 17:17:11,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:11,733 INFO L276 IsEmpty]: Start isEmpty. Operand 51452 states and 199519 transitions. [2021-06-05 17:17:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:17:11,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:17:11,810 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:17:12,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2021-06-05 17:17:12,011 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:17:12,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:17:12,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1664696114, now seen corresponding path program 217 times [2021-06-05 17:17:12,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:17:12,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454498531] [2021-06-05 17:17:12,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:17:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:17:12,273 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-06-05 17:17:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:17:12,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:17:12,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454498531] [2021-06-05 17:17:12,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454498531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:12,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525055789] [2021-06-05 17:17:12,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:17:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:17:12,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:17:12,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:17:12,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:17:12,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:17:12,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:17:12,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:17:12,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:17:12,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:17:12,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 17:17:12,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:17:12,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:17:12,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:17:12,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 17:17:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:17:12,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525055789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:12,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:17:12,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:17:12,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879756888] [2021-06-05 17:17:12,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:17:12,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:17:12,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:17:12,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:17:12,736 INFO L87 Difference]: Start difference. First operand 51452 states and 199519 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:15,433 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-06-05 17:17:17,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:17:17,704 INFO L93 Difference]: Finished difference Result 96185 states and 357201 transitions. [2021-06-05 17:17:17,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 17:17:17,704 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:17:17,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:17:17,960 INFO L225 Difference]: With dead ends: 96185 [2021-06-05 17:17:17,960 INFO L226 Difference]: Without dead ends: 96140 [2021-06-05 17:17:17,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2287 ImplicationChecksByTransitivity, 3944.7ms TimeCoverageRelationStatistics Valid=972, Invalid=6000, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 17:17:18,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96140 states. [2021-06-05 17:17:19,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96140 to 51498. [2021-06-05 17:17:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51498 states, 51497 states have (on average 3.878633706817873) internal successors, (199738), 51497 states have internal predecessors, (199738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:19,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51498 states to 51498 states and 199738 transitions. [2021-06-05 17:17:19,638 INFO L78 Accepts]: Start accepts. Automaton has 51498 states and 199738 transitions. Word has length 30 [2021-06-05 17:17:19,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:17:19,638 INFO L482 AbstractCegarLoop]: Abstraction has 51498 states and 199738 transitions. [2021-06-05 17:17:19,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:19,638 INFO L276 IsEmpty]: Start isEmpty. Operand 51498 states and 199738 transitions. [2021-06-05 17:17:19,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:17:19,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:17:19,722 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:17:19,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable719,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:17:19,922 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:17:19,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:17:19,923 INFO L82 PathProgramCache]: Analyzing trace with hash -796622530, now seen corresponding path program 218 times [2021-06-05 17:17:19,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:17:19,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172421546] [2021-06-05 17:17:19,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:17:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:17:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:17:20,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:17:20,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172421546] [2021-06-05 17:17:20,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172421546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:20,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091550779] [2021-06-05 17:17:20,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:17:20,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:17:20,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:17:20,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:17:20,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:17:20,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:17:20,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:17:20,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:17:20,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:17:20,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:17:20,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 43 [2021-06-05 17:17:20,321 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:17:20,335 INFO L628 ElimStorePlain]: treesize reduction 19, result has 51.3 percent of original size [2021-06-05 17:17:20,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:17:20,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:21 [2021-06-05 17:17:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:17:20,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091550779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:20,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:17:20,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:17:20,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136645518] [2021-06-05 17:17:20,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:17:20,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:17:20,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:17:20,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:17:20,380 INFO L87 Difference]: Start difference. First operand 51498 states and 199738 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:21,928 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-05 17:17:25,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:17:25,918 INFO L93 Difference]: Finished difference Result 99308 states and 368805 transitions. [2021-06-05 17:17:25,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 17:17:25,918 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:17:25,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:17:26,192 INFO L225 Difference]: With dead ends: 99308 [2021-06-05 17:17:26,192 INFO L226 Difference]: Without dead ends: 99263 [2021-06-05 17:17:26,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 4145.9ms TimeCoverageRelationStatistics Valid=1207, Invalid=6625, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 17:17:26,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99263 states. [2021-06-05 17:17:27,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99263 to 51487. [2021-06-05 17:17:27,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51487 states, 51486 states have (on average 3.8783358582915746) internal successors, (199680), 51486 states have internal predecessors, (199680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:27,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51487 states to 51487 states and 199680 transitions. [2021-06-05 17:17:27,927 INFO L78 Accepts]: Start accepts. Automaton has 51487 states and 199680 transitions. Word has length 30 [2021-06-05 17:17:27,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:17:27,927 INFO L482 AbstractCegarLoop]: Abstraction has 51487 states and 199680 transitions. [2021-06-05 17:17:27,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:27,927 INFO L276 IsEmpty]: Start isEmpty. Operand 51487 states and 199680 transitions. [2021-06-05 17:17:28,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:17:28,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:17:28,292 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:17:28,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable720 [2021-06-05 17:17:28,507 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:17:28,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:17:28,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1365074840, now seen corresponding path program 219 times [2021-06-05 17:17:28,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:17:28,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694961926] [2021-06-05 17:17:28,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:17:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:17:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:17:28,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:17:28,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694961926] [2021-06-05 17:17:28,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694961926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:28,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925618088] [2021-06-05 17:17:28,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:17:28,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:17:28,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:17:28,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 17:17:28,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:17:29,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:17:29,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:17:29,133 INFO L354 Elim1Store]: treesize reduction 37, result has 49.3 percent of original size [2021-06-05 17:17:29,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 57 treesize of output 76 [2021-06-05 17:17:29,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:17:29,209 INFO L628 ElimStorePlain]: treesize reduction 27, result has 79.4 percent of original size [2021-06-05 17:17:29,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:17:29,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:75, output treesize:41 [2021-06-05 17:17:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:17:29,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925618088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:29,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:17:29,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-06-05 17:17:29,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435195763] [2021-06-05 17:17:29,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 17:17:29,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:17:29,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 17:17:29,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:17:29,256 INFO L87 Difference]: Start difference. First operand 51487 states and 199680 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:31,573 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 Received shutdown request... [2021-06-05 17:17:35,176 WARN L222 SmtUtils]: Removed 6 from assertion stack [2021-06-05 17:17:35,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 17:17:35,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable726,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:17:35,377 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 17:17:35,378 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 17:17:35,379 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 17:17:35,380 INFO L202 PluginConnector]: Adding new model sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:17:35 BasicIcfg [2021-06-05 17:17:35,380 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 17:17:35,380 INFO L168 Benchmark]: Toolchain (without parser) took 807256.47 ms. Allocated memory was 339.7 MB in the beginning and 15.9 GB in the end (delta: 15.6 GB). Free memory was 320.2 MB in the beginning and 11.1 GB in the end (delta: -10.8 GB). Peak memory consumption was 4.7 GB. Max. memory is 16.0 GB. [2021-06-05 17:17:35,380 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 339.7 MB. Free memory was 321.4 MB in the beginning and 321.4 MB in the end (delta: 70.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 17:17:35,380 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.02 ms. Allocated memory is still 339.7 MB. Free memory was 320.2 MB in the beginning and 318.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 17:17:35,380 INFO L168 Benchmark]: Boogie Preprocessor took 12.90 ms. Allocated memory is still 339.7 MB. Free memory was 318.7 MB in the beginning and 317.7 MB in the end (delta: 992.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 17:17:35,380 INFO L168 Benchmark]: RCFGBuilder took 270.89 ms. Allocated memory is still 339.7 MB. Free memory was 317.7 MB in the beginning and 305.0 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 17:17:35,380 INFO L168 Benchmark]: TraceAbstraction took 806949.71 ms. Allocated memory was 339.7 MB in the beginning and 15.9 GB in the end (delta: 15.6 GB). Free memory was 304.5 MB in the beginning and 11.1 GB in the end (delta: -10.8 GB). Peak memory consumption was 4.7 GB. Max. memory is 16.0 GB. [2021-06-05 17:17:35,381 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 339.7 MB. Free memory was 321.4 MB in the beginning and 321.4 MB in the end (delta: 70.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.02 ms. Allocated memory is still 339.7 MB. Free memory was 320.2 MB in the beginning and 318.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.90 ms. Allocated memory is still 339.7 MB. Free memory was 318.7 MB in the beginning and 317.7 MB in the end (delta: 992.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 270.89 ms. Allocated memory is still 339.7 MB. Free memory was 317.7 MB in the beginning and 305.0 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 806949.71 ms. Allocated memory was 339.7 MB in the beginning and 15.9 GB in the end (delta: 15.6 GB). Free memory was 304.5 MB in the beginning and 11.1 GB in the end (delta: -10.8 GB). Peak memory consumption was 4.7 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (51487states) and FLOYD_HOARE automaton (currently 68 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 70 for 55ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (51487states) and FLOYD_HOARE automaton (currently 68 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 70 for 55ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (51487states) and FLOYD_HOARE automaton (currently 68 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 70 for 55ms.. - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (51487states) and FLOYD_HOARE automaton (currently 68 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 70 for 55ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 806852.4ms, OverallIterations: 314, TraceHistogramMax: 3, EmptinessCheckTime: 10072.3ms, AutomataDifference: 465954.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 34.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16145 SDtfs, 88899 SDslu, 139355 SDs, 0 SdLazy, 237994 SolverSat, 15821 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 108803.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21307 GetRequests, 6580 SyntacticMatches, 388 SemanticMatches, 14338 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261354 ImplicationChecksByTransitivity, 320504.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55780occurred in iteration=259, InterpolantAutomatonStates: 12498, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 171412.0ms AutomataMinimizationTime, 313 MinimizatonAttempts, 2842493 StatesRemovedByMinimization, 312 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 906.2ms SsaConstructionTime, 2896.5ms SatisfiabilityAnalysisTime, 85956.4ms InterpolantComputationTime, 17038 NumberOfCodeBlocks, 17038 NumberOfCodeBlocksAsserted, 1095 NumberOfCheckSat, 16412 ConstructedInterpolants, 404 QuantifiedInterpolants, 208823 SizeOfPredicates, 1537 NumberOfNonLiveVariables, 22186 ConjunctsInSsa, 5707 ConjunctsInUnsatCore, 626 InterpolantComputations, 2 PerfectInterpolantSequences, 1056/5885 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown