/usr/bin/java -Xmx8000000000 -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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 19:28:37,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 19:28:37,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 19:28:37,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 19:28:37,317 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.epf [2021-08-12 19:28:37,352 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 19:28:37,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 19:28:37,353 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 19:28:37,353 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 19:28:37,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 19:28:37,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 19:28:37,356 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 19:28:37,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 19:28:37,356 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 19:28:37,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 19:28:37,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 19:28:37,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 19:28:37,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 19:28:37,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 19:28:37,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 19:28:37,358 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 19:28:37,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 19:28:37,358 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 19:28:37,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 19:28:37,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 19:28:37,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 19:28:37,358 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 19:28:37,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 19:28:37,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:28:37,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 19:28:37,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 19:28:37,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 19:28:37,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 19:28:37,360 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 19:28:37,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 19:28:37,360 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 19:28:37,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 19:28:37,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 19:28:37,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 19:28:37,737 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 19:28:37,738 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 19:28:37,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl [2021-08-12 19:28:37,739 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl' [2021-08-12 19:28:37,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 19:28:37,774 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 19:28:37,775 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 19:28:37,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 19:28:37,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 19:28:37,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:37" (1/1) ... [2021-08-12 19:28:37,791 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:37" (1/1) ... [2021-08-12 19:28:37,797 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 19:28:37,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 19:28:37,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 19:28:37,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 19:28:37,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:37" (1/1) ... [2021-08-12 19:28:37,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:37" (1/1) ... [2021-08-12 19:28:37,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:37" (1/1) ... [2021-08-12 19:28:37,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:37" (1/1) ... [2021-08-12 19:28:37,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:37" (1/1) ... [2021-08-12 19:28:37,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:37" (1/1) ... [2021-08-12 19:28:37,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:37" (1/1) ... [2021-08-12 19:28:37,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 19:28:37,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 19:28:37,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 19:28:37,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 19:28:37,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:37" (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 [2021-08-12 19:28:37,887 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 19:28:37,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 19:28:37,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 19:28:37,888 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 19:28:37,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 19:28:37,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 19:28:37,888 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 19:28:37,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 19:28:37,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 19:28:37,889 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 19:28:38,124 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 19:28:38,124 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 19:28:38,126 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:28:38 BoogieIcfgContainer [2021-08-12 19:28:38,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 19:28:38,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 19:28:38,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 19:28:38,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 19:28:38,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:37" (1/2) ... [2021-08-12 19:28:38,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396ddb64 and model type figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 07:28:38, skipping insertion in model container [2021-08-12 19:28:38,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:28:38" (2/2) ... [2021-08-12 19:28:38,132 INFO L111 eAbstractionObserver]: Analyzing ICFG figure1.wvr.bpl [2021-08-12 19:28:38,137 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 19:28:38,137 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 19:28:38,138 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 19:28:38,194 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-12 19:28:38,211 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-12 19:28:38,229 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 19:28:38,229 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 19:28:38,229 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 19:28:38,229 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 19:28:38,229 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 19:28:38,229 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 19:28:38,230 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 19:28:38,230 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 19:28:38,247 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-08-12 19:28:38,259 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:38,263 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 19:28:38,270 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:38,270 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:38,271 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:38,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:38,281 INFO L82 PathProgramCache]: Analyzing trace with hash -155133599, now seen corresponding path program 1 times [2021-08-12 19:28:38,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:38,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951236405] [2021-08-12 19:28:38,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:38,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:38,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951236405] [2021-08-12 19:28:38,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951236405] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:28:38,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:28:38,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:28:38,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714633734] [2021-08-12 19:28:38,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:28:38,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:38,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:28:38,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:28:38,461 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 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 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:38,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:38,505 INFO L93 Difference]: Finished difference Result 82 states and 152 transitions. [2021-08-12 19:28:38,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:28:38,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 19:28:38,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:38,515 INFO L225 Difference]: With dead ends: 82 [2021-08-12 19:28:38,515 INFO L226 Difference]: Without dead ends: 42 [2021-08-12 19:28:38,517 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:28:38,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-12 19:28:38,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-08-12 19:28:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:38,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 71 transitions. [2021-08-12 19:28:38,557 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 71 transitions. Word has length 14 [2021-08-12 19:28:38,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:38,557 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 71 transitions. [2021-08-12 19:28:38,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:38,558 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 71 transitions. [2021-08-12 19:28:38,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:28:38,558 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:38,559 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:38,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 19:28:38,559 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:38,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:38,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1800134561, now seen corresponding path program 1 times [2021-08-12 19:28:38,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:38,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097542925] [2021-08-12 19:28:38,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:38,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:38,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097542925] [2021-08-12 19:28:38,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097542925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:38,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24935297] [2021-08-12 19:28:38,634 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 [2021-08-12 19:28:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:38,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:28:38,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:38,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24935297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:38,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:38,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-08-12 19:28:38,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894309189] [2021-08-12 19:28:38,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:28:38,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:38,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:28:38,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:28:38,797 INFO L87 Difference]: Start difference. First operand 40 states and 71 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:38,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:38,918 INFO L93 Difference]: Finished difference Result 76 states and 132 transitions. [2021-08-12 19:28:38,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:28:38,919 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-12 19:28:38,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:38,920 INFO L225 Difference]: With dead ends: 76 [2021-08-12 19:28:38,920 INFO L226 Difference]: Without dead ends: 63 [2021-08-12 19:28:38,921 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:28:38,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-12 19:28:38,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2021-08-12 19:28:38,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:38,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 80 transitions. [2021-08-12 19:28:38,929 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 80 transitions. Word has length 16 [2021-08-12 19:28:38,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:38,929 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 80 transitions. [2021-08-12 19:28:38,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:38,930 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 80 transitions. [2021-08-12 19:28:38,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:28:38,930 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:38,930 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:39,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-08-12 19:28:39,145 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:39,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:39,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1152959347, now seen corresponding path program 2 times [2021-08-12 19:28:39,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:39,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057425758] [2021-08-12 19:28:39,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:39,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:39,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057425758] [2021-08-12 19:28:39,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057425758] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:28:39,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:28:39,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:28:39,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904230265] [2021-08-12 19:28:39,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:28:39,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:39,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:28:39,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:28:39,198 INFO L87 Difference]: Start difference. First operand 45 states and 80 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:39,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:39,288 INFO L93 Difference]: Finished difference Result 63 states and 108 transitions. [2021-08-12 19:28:39,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:28:39,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-12 19:28:39,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:39,289 INFO L225 Difference]: With dead ends: 63 [2021-08-12 19:28:39,290 INFO L226 Difference]: Without dead ends: 48 [2021-08-12 19:28:39,290 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:28:39,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-12 19:28:39,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2021-08-12 19:28:39,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:39,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 76 transitions. [2021-08-12 19:28:39,297 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 76 transitions. Word has length 16 [2021-08-12 19:28:39,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:39,297 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 76 transitions. [2021-08-12 19:28:39,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:39,297 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 76 transitions. [2021-08-12 19:28:39,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:28:39,298 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:39,298 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:39,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 19:28:39,298 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:39,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:39,299 INFO L82 PathProgramCache]: Analyzing trace with hash 19790621, now seen corresponding path program 1 times [2021-08-12 19:28:39,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:39,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015609571] [2021-08-12 19:28:39,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:39,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:39,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015609571] [2021-08-12 19:28:39,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015609571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:39,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978756515] [2021-08-12 19:28:39,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-08-12 19:28:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:39,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:28:39,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:39,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978756515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:39,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:39,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-12 19:28:39,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668473467] [2021-08-12 19:28:39,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:28:39,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:39,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:28:39,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:28:39,524 INFO L87 Difference]: Start difference. First operand 43 states and 76 transitions. Second operand has 4 states, 4 states have (on average 4.5) 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) [2021-08-12 19:28:39,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:39,586 INFO L93 Difference]: Finished difference Result 119 states and 222 transitions. [2021-08-12 19:28:39,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:28:39,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) 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 [2021-08-12 19:28:39,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:39,588 INFO L225 Difference]: With dead ends: 119 [2021-08-12 19:28:39,588 INFO L226 Difference]: Without dead ends: 75 [2021-08-12 19:28:39,588 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:28:39,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-12 19:28:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2021-08-12 19:28:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:39,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 109 transitions. [2021-08-12 19:28:39,597 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 109 transitions. Word has length 18 [2021-08-12 19:28:39,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:39,597 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 109 transitions. [2021-08-12 19:28:39,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) 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) [2021-08-12 19:28:39,597 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 109 transitions. [2021-08-12 19:28:39,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:28:39,598 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:39,598 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:39,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:39,826 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:39,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:39,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1443468059, now seen corresponding path program 2 times [2021-08-12 19:28:39,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:39,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74775879] [2021-08-12 19:28:39,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:39,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:39,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:39,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74775879] [2021-08-12 19:28:39,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74775879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:39,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910705543] [2021-08-12 19:28:39,981 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 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 [2021-08-12 19:28:40,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:28:40,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:40,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:28:40,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:40,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910705543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:40,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:40,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-12 19:28:40,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900542406] [2021-08-12 19:28:40,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:28:40,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:40,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:28:40,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:28:40,191 INFO L87 Difference]: Start difference. First operand 58 states and 109 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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) [2021-08-12 19:28:40,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:40,545 INFO L93 Difference]: Finished difference Result 186 states and 366 transitions. [2021-08-12 19:28:40,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:28:40,546 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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 20 [2021-08-12 19:28:40,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:40,547 INFO L225 Difference]: With dead ends: 186 [2021-08-12 19:28:40,548 INFO L226 Difference]: Without dead ends: 167 [2021-08-12 19:28:40,548 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:28:40,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-08-12 19:28:40,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 67. [2021-08-12 19:28:40,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 129 transitions. [2021-08-12 19:28:40,559 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 129 transitions. Word has length 20 [2021-08-12 19:28:40,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:40,559 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 129 transitions. [2021-08-12 19:28:40,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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) [2021-08-12 19:28:40,560 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 129 transitions. [2021-08-12 19:28:40,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:28:40,560 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:40,560 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:40,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:40,785 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:40,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:40,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1693280397, now seen corresponding path program 3 times [2021-08-12 19:28:40,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:40,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428885443] [2021-08-12 19:28:40,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:40,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:40,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428885443] [2021-08-12 19:28:40,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428885443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:40,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318105830] [2021-08-12 19:28:40,839 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 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 [2021-08-12 19:28:40,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:28:40,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:40,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:28:40,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:41,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318105830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:41,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:41,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-12 19:28:41,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923683144] [2021-08-12 19:28:41,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:28:41,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:41,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:28:41,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:28:41,051 INFO L87 Difference]: Start difference. First operand 67 states and 129 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:41,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:41,359 INFO L93 Difference]: Finished difference Result 158 states and 291 transitions. [2021-08-12 19:28:41,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:28:41,360 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:28:41,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:41,361 INFO L225 Difference]: With dead ends: 158 [2021-08-12 19:28:41,361 INFO L226 Difference]: Without dead ends: 141 [2021-08-12 19:28:41,362 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:28:41,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-08-12 19:28:41,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 66. [2021-08-12 19:28:41,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:41,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 126 transitions. [2021-08-12 19:28:41,370 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 126 transitions. Word has length 20 [2021-08-12 19:28:41,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:41,370 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 126 transitions. [2021-08-12 19:28:41,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:41,370 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 126 transitions. [2021-08-12 19:28:41,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:28:41,371 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:41,371 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:41,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:41,585 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:41,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:41,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1024348455, now seen corresponding path program 4 times [2021-08-12 19:28:41,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:41,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518872900] [2021-08-12 19:28:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:41,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:41,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518872900] [2021-08-12 19:28:41,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518872900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:41,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806963061] [2021-08-12 19:28:41,643 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 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 [2021-08-12 19:28:41,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:28:41,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:41,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:28:41,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:41,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806963061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:41,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:41,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 19:28:41,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289377777] [2021-08-12 19:28:41,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:28:41,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:41,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:28:41,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:28:41,739 INFO L87 Difference]: Start difference. First operand 66 states and 126 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:41,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:41,777 INFO L93 Difference]: Finished difference Result 185 states and 358 transitions. [2021-08-12 19:28:41,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:28:41,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:28:41,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:41,779 INFO L225 Difference]: With dead ends: 185 [2021-08-12 19:28:41,779 INFO L226 Difference]: Without dead ends: 135 [2021-08-12 19:28:41,780 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:28:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-12 19:28:41,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2021-08-12 19:28:41,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.048076923076923) internal successors, (213), 104 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:41,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 213 transitions. [2021-08-12 19:28:41,801 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 213 transitions. Word has length 22 [2021-08-12 19:28:41,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:41,802 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 213 transitions. [2021-08-12 19:28:41,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:41,802 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 213 transitions. [2021-08-12 19:28:41,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:28:41,803 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:41,803 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:42,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-08-12 19:28:42,025 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:42,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:42,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1876617257, now seen corresponding path program 5 times [2021-08-12 19:28:42,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:42,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894168835] [2021-08-12 19:28:42,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:42,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:42,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:42,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894168835] [2021-08-12 19:28:42,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894168835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:42,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118453799] [2021-08-12 19:28:42,128 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 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 [2021-08-12 19:28:42,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:28:42,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:42,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:28:42,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:42,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118453799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:42,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:42,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-12 19:28:42,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975723421] [2021-08-12 19:28:42,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:28:42,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:42,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:28:42,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:28:42,338 INFO L87 Difference]: Start difference. First operand 105 states and 213 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) [2021-08-12 19:28:42,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:42,897 INFO L93 Difference]: Finished difference Result 379 states and 780 transitions. [2021-08-12 19:28:42,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:28:42,898 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 24 [2021-08-12 19:28:42,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:42,900 INFO L225 Difference]: With dead ends: 379 [2021-08-12 19:28:42,900 INFO L226 Difference]: Without dead ends: 334 [2021-08-12 19:28:42,901 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 457.7ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:28:42,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-08-12 19:28:42,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 92. [2021-08-12 19:28:42,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 179 transitions. [2021-08-12 19:28:42,911 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 179 transitions. Word has length 24 [2021-08-12 19:28:42,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:42,911 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 179 transitions. [2021-08-12 19:28:42,911 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) [2021-08-12 19:28:42,911 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 179 transitions. [2021-08-12 19:28:42,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:28:42,912 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:42,912 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:43,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:43,129 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:43,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1240439411, now seen corresponding path program 6 times [2021-08-12 19:28:43,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:43,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000331013] [2021-08-12 19:28:43,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:43,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:43,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000331013] [2021-08-12 19:28:43,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000331013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:43,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146007840] [2021-08-12 19:28:43,186 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 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 [2021-08-12 19:28:43,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:28:43,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:43,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:28:43,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:43,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146007840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:43,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:43,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-08-12 19:28:43,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953225193] [2021-08-12 19:28:43,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:28:43,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:43,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:28:43,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:28:43,362 INFO L87 Difference]: Start difference. First operand 92 states and 179 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) 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) [2021-08-12 19:28:43,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:43,884 INFO L93 Difference]: Finished difference Result 252 states and 477 transitions. [2021-08-12 19:28:43,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:28:43,884 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) 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 24 [2021-08-12 19:28:43,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:43,886 INFO L225 Difference]: With dead ends: 252 [2021-08-12 19:28:43,886 INFO L226 Difference]: Without dead ends: 235 [2021-08-12 19:28:43,887 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 444.5ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:28:43,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-08-12 19:28:43,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 84. [2021-08-12 19:28:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9759036144578312) internal successors, (164), 83 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 164 transitions. [2021-08-12 19:28:43,894 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 164 transitions. Word has length 24 [2021-08-12 19:28:43,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:43,895 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 164 transitions. [2021-08-12 19:28:43,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) 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) [2021-08-12 19:28:43,895 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 164 transitions. [2021-08-12 19:28:43,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:28:43,896 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:43,896 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:44,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:44,120 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:44,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:44,120 INFO L82 PathProgramCache]: Analyzing trace with hash -465636203, now seen corresponding path program 7 times [2021-08-12 19:28:44,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:44,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132839577] [2021-08-12 19:28:44,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:44,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:44,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132839577] [2021-08-12 19:28:44,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132839577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:44,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607294895] [2021-08-12 19:28:44,175 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 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 [2021-08-12 19:28:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:44,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:28:44,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:44,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607294895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:44,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:44,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-12 19:28:44,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606889230] [2021-08-12 19:28:44,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:28:44,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:44,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:28:44,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:28:44,255 INFO L87 Difference]: Start difference. First operand 84 states and 164 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:44,320 INFO L93 Difference]: Finished difference Result 244 states and 475 transitions. [2021-08-12 19:28:44,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:28:44,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:28:44,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:44,322 INFO L225 Difference]: With dead ends: 244 [2021-08-12 19:28:44,322 INFO L226 Difference]: Without dead ends: 188 [2021-08-12 19:28:44,322 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:28:44,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-08-12 19:28:44,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2021-08-12 19:28:44,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.0833333333333335) internal successors, (300), 144 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 300 transitions. [2021-08-12 19:28:44,332 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 300 transitions. Word has length 26 [2021-08-12 19:28:44,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:44,333 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 300 transitions. [2021-08-12 19:28:44,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 300 transitions. [2021-08-12 19:28:44,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:28:44,334 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:44,334 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:44,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-12 19:28:44,541 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:44,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:44,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1485197677, now seen corresponding path program 8 times [2021-08-12 19:28:44,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:44,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817326257] [2021-08-12 19:28:44,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:44,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:44,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817326257] [2021-08-12 19:28:44,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817326257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:44,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325884660] [2021-08-12 19:28:44,645 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 [2021-08-12 19:28:44,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:28:44,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:44,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:28:44,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:44,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325884660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:44,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:44,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-12 19:28:44,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005006827] [2021-08-12 19:28:44,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:28:44,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:44,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:28:44,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:28:44,873 INFO L87 Difference]: Start difference. First operand 145 states and 300 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-08-12 19:28:45,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:45,796 INFO L93 Difference]: Finished difference Result 576 states and 1190 transitions. [2021-08-12 19:28:45,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 19:28:45,797 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 28 [2021-08-12 19:28:45,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:45,800 INFO L225 Difference]: With dead ends: 576 [2021-08-12 19:28:45,800 INFO L226 Difference]: Without dead ends: 495 [2021-08-12 19:28:45,801 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 730.7ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-08-12 19:28:45,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-08-12 19:28:45,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 114. [2021-08-12 19:28:45,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.991150442477876) internal successors, (225), 113 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:45,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 225 transitions. [2021-08-12 19:28:45,813 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 225 transitions. Word has length 28 [2021-08-12 19:28:45,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:45,813 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 225 transitions. [2021-08-12 19:28:45,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-08-12 19:28:45,813 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 225 transitions. [2021-08-12 19:28:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:28:45,814 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:45,814 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:46,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:46,038 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:46,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:46,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1081045901, now seen corresponding path program 9 times [2021-08-12 19:28:46,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:46,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510394879] [2021-08-12 19:28:46,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:46,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:46,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510394879] [2021-08-12 19:28:46,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510394879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:46,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786609173] [2021-08-12 19:28:46,122 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 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 [2021-08-12 19:28:46,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 19:28:46,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:46,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:28:46,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:46,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786609173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:46,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:46,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-08-12 19:28:46,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382710972] [2021-08-12 19:28:46,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:28:46,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:46,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:28:46,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:28:46,341 INFO L87 Difference]: Start difference. First operand 114 states and 225 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) [2021-08-12 19:28:47,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:47,070 INFO L93 Difference]: Finished difference Result 364 states and 701 transitions. [2021-08-12 19:28:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-12 19:28:47,071 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 28 [2021-08-12 19:28:47,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:47,073 INFO L225 Difference]: With dead ends: 364 [2021-08-12 19:28:47,073 INFO L226 Difference]: Without dead ends: 347 [2021-08-12 19:28:47,074 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 648.6ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 19:28:47,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-08-12 19:28:47,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 102. [2021-08-12 19:28:47,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:47,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-08-12 19:28:47,084 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 28 [2021-08-12 19:28:47,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:47,084 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-08-12 19:28:47,084 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) [2021-08-12 19:28:47,084 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-08-12 19:28:47,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:28:47,085 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:47,085 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:47,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:47,297 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:47,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:47,297 INFO L82 PathProgramCache]: Analyzing trace with hash 2026425425, now seen corresponding path program 10 times [2021-08-12 19:28:47,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:47,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523558728] [2021-08-12 19:28:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:47,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:47,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523558728] [2021-08-12 19:28:47,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523558728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:47,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997377818] [2021-08-12 19:28:47,389 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 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 [2021-08-12 19:28:47,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:28:47,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:47,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:28:47,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:47,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997377818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:47,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:47,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-12 19:28:47,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194827282] [2021-08-12 19:28:47,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:28:47,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:47,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:28:47,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:28:47,466 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:47,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:47,547 INFO L93 Difference]: Finished difference Result 303 states and 592 transitions. [2021-08-12 19:28:47,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:28:47,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:28:47,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:47,549 INFO L225 Difference]: With dead ends: 303 [2021-08-12 19:28:47,549 INFO L226 Difference]: Without dead ends: 241 [2021-08-12 19:28:47,550 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:28:47,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-08-12 19:28:47,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 185. [2021-08-12 19:28:47,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.1032608695652173) internal successors, (387), 184 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:47,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 387 transitions. [2021-08-12 19:28:47,564 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 387 transitions. Word has length 30 [2021-08-12 19:28:47,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:47,565 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 387 transitions. [2021-08-12 19:28:47,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:47,565 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 387 transitions. [2021-08-12 19:28:47,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:47,565 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:47,565 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:47,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-12 19:28:47,777 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:47,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:47,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1274697551, now seen corresponding path program 11 times [2021-08-12 19:28:47,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:47,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218816032] [2021-08-12 19:28:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:47,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:47,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218816032] [2021-08-12 19:28:47,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218816032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:47,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442849928] [2021-08-12 19:28:47,919 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 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 [2021-08-12 19:28:47,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:28:47,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:47,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:28:47,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:48,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442849928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:48,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:48,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-08-12 19:28:48,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872807254] [2021-08-12 19:28:48,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:28:48,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:48,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:28:48,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:28:48,207 INFO L87 Difference]: Start difference. First operand 185 states and 387 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:49,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:49,514 INFO L93 Difference]: Finished difference Result 801 states and 1656 transitions. [2021-08-12 19:28:49,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-12 19:28:49,515 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:28:49,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:49,518 INFO L225 Difference]: With dead ends: 801 [2021-08-12 19:28:49,518 INFO L226 Difference]: Without dead ends: 678 [2021-08-12 19:28:49,519 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 1003.2ms TimeCoverageRelationStatistics Valid=1299, Invalid=3671, Unknown=0, NotChecked=0, Total=4970 [2021-08-12 19:28:49,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-08-12 19:28:49,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 136. [2021-08-12 19:28:49,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 135 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:49,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 271 transitions. [2021-08-12 19:28:49,536 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 271 transitions. Word has length 32 [2021-08-12 19:28:49,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:49,536 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 271 transitions. [2021-08-12 19:28:49,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:49,536 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 271 transitions. [2021-08-12 19:28:49,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:49,537 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:49,537 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:49,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-12 19:28:49,745 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:49,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:49,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1086729587, now seen corresponding path program 12 times [2021-08-12 19:28:49,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:49,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333131845] [2021-08-12 19:28:49,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:49,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:49,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333131845] [2021-08-12 19:28:49,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333131845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:49,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595909092] [2021-08-12 19:28:49,815 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 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 [2021-08-12 19:28:49,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 19:28:49,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:49,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:28:49,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:50,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595909092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:50,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:50,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-08-12 19:28:50,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98281922] [2021-08-12 19:28:50,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:28:50,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:50,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:28:50,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:28:50,068 INFO L87 Difference]: Start difference. First operand 136 states and 271 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-08-12 19:28:51,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:51,181 INFO L93 Difference]: Finished difference Result 498 states and 969 transitions. [2021-08-12 19:28:51,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-12 19:28:51,182 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 32 [2021-08-12 19:28:51,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:51,184 INFO L225 Difference]: With dead ends: 498 [2021-08-12 19:28:51,184 INFO L226 Difference]: Without dead ends: 481 [2021-08-12 19:28:51,186 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 945.1ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-08-12 19:28:51,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-08-12 19:28:51,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 120. [2021-08-12 19:28:51,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0168067226890756) internal successors, (240), 119 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:51,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 240 transitions. [2021-08-12 19:28:51,202 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 240 transitions. Word has length 32 [2021-08-12 19:28:51,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:51,202 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 240 transitions. [2021-08-12 19:28:51,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-08-12 19:28:51,202 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 240 transitions. [2021-08-12 19:28:51,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:28:51,203 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:51,203 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:51,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 19:28:51,422 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:51,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:51,422 INFO L82 PathProgramCache]: Analyzing trace with hash -4049395, now seen corresponding path program 13 times [2021-08-12 19:28:51,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:51,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811119018] [2021-08-12 19:28:51,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:51,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:51,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811119018] [2021-08-12 19:28:51,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811119018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:51,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066132234] [2021-08-12 19:28:51,491 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 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 [2021-08-12 19:28:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:51,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 19:28:51,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:51,596 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:51,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066132234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:51,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:51,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-12 19:28:51,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090084088] [2021-08-12 19:28:51,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:28:51,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:51,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:28:51,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:28:51,597 INFO L87 Difference]: Start difference. First operand 120 states and 240 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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) [2021-08-12 19:28:51,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:51,723 INFO L93 Difference]: Finished difference Result 362 states and 709 transitions. [2021-08-12 19:28:51,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:28:51,724 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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 34 [2021-08-12 19:28:51,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:51,726 INFO L225 Difference]: With dead ends: 362 [2021-08-12 19:28:51,726 INFO L226 Difference]: Without dead ends: 294 [2021-08-12 19:28:51,726 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:28:51,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-08-12 19:28:51,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 225. [2021-08-12 19:28:51,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.1160714285714284) internal successors, (474), 224 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:51,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 474 transitions. [2021-08-12 19:28:51,747 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 474 transitions. Word has length 34 [2021-08-12 19:28:51,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:51,747 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 474 transitions. [2021-08-12 19:28:51,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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) [2021-08-12 19:28:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 474 transitions. [2021-08-12 19:28:51,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:28:51,748 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:51,748 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:51,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:51,964 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:51,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:51,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2031751691, now seen corresponding path program 14 times [2021-08-12 19:28:51,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:51,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363266786] [2021-08-12 19:28:51,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:52,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:52,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363266786] [2021-08-12 19:28:52,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363266786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:52,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072482402] [2021-08-12 19:28:52,114 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 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 [2021-08-12 19:28:52,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:28:52,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:52,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:28:52,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:52,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072482402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:52,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:52,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-12 19:28:52,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741134150] [2021-08-12 19:28:52,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-08-12 19:28:52,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:52,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-12 19:28:52,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:28:52,449 INFO L87 Difference]: Start difference. First operand 225 states and 474 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:54,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:54,310 INFO L93 Difference]: Finished difference Result 1054 states and 2178 transitions. [2021-08-12 19:28:54,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-12 19:28:54,310 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-12 19:28:54,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:54,314 INFO L225 Difference]: With dead ends: 1054 [2021-08-12 19:28:54,314 INFO L226 Difference]: Without dead ends: 883 [2021-08-12 19:28:54,316 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 1452.0ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-08-12 19:28:54,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-08-12 19:28:54,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 158. [2021-08-12 19:28:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.0191082802547773) internal successors, (317), 157 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 317 transitions. [2021-08-12 19:28:54,339 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 317 transitions. Word has length 36 [2021-08-12 19:28:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:54,340 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 317 transitions. [2021-08-12 19:28:54,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 317 transitions. [2021-08-12 19:28:54,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:28:54,340 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:54,340 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:54,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-12 19:28:54,550 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:54,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:54,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1527693965, now seen corresponding path program 15 times [2021-08-12 19:28:54,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:54,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939782007] [2021-08-12 19:28:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:54,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:54,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939782007] [2021-08-12 19:28:54,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939782007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:54,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747925671] [2021-08-12 19:28:54,648 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 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 [2021-08-12 19:28:54,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-12 19:28:54,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:54,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:28:54,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:54,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747925671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:54,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:54,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-08-12 19:28:54,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041857486] [2021-08-12 19:28:54,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:28:54,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:54,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:28:54,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:28:54,972 INFO L87 Difference]: Start difference. First operand 158 states and 317 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:56,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:56,484 INFO L93 Difference]: Finished difference Result 654 states and 1281 transitions. [2021-08-12 19:28:56,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-12 19:28:56,485 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-12 19:28:56,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:56,488 INFO L225 Difference]: With dead ends: 654 [2021-08-12 19:28:56,488 INFO L226 Difference]: Without dead ends: 637 [2021-08-12 19:28:56,490 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2300 ImplicationChecksByTransitivity, 1317.6ms TimeCoverageRelationStatistics Valid=1724, Invalid=5416, Unknown=0, NotChecked=0, Total=7140 [2021-08-12 19:28:56,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-08-12 19:28:56,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 138. [2021-08-12 19:28:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0291970802919708) internal successors, (278), 137 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 278 transitions. [2021-08-12 19:28:56,511 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 278 transitions. Word has length 36 [2021-08-12 19:28:56,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:56,511 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 278 transitions. [2021-08-12 19:28:56,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:56,511 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 278 transitions. [2021-08-12 19:28:56,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-12 19:28:56,512 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:56,512 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:56,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-12 19:28:56,721 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:56,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:56,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1675506121, now seen corresponding path program 16 times [2021-08-12 19:28:56,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:56,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781194971] [2021-08-12 19:28:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:56,819 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:56,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:56,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781194971] [2021-08-12 19:28:56,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781194971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:56,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273641776] [2021-08-12 19:28:56,820 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 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 [2021-08-12 19:28:56,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:28:56,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:56,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:28:56,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:56,921 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:56,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273641776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:56,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:56,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-12 19:28:56,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637575322] [2021-08-12 19:28:56,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:28:56,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:56,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:28:56,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:28:56,924 INFO L87 Difference]: Start difference. First operand 138 states and 278 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2021-08-12 19:28:57,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:57,101 INFO L93 Difference]: Finished difference Result 421 states and 826 transitions. [2021-08-12 19:28:57,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:28:57,101 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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 38 [2021-08-12 19:28:57,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:57,103 INFO L225 Difference]: With dead ends: 421 [2021-08-12 19:28:57,103 INFO L226 Difference]: Without dead ends: 347 [2021-08-12 19:28:57,104 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:28:57,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-08-12 19:28:57,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 265. [2021-08-12 19:28:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.125) internal successors, (561), 264 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:57,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 561 transitions. [2021-08-12 19:28:57,131 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 561 transitions. Word has length 38 [2021-08-12 19:28:57,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:57,131 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 561 transitions. [2021-08-12 19:28:57,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2021-08-12 19:28:57,131 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 561 transitions. [2021-08-12 19:28:57,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-12 19:28:57,132 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:57,132 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:57,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:57,355 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:57,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:57,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1976295111, now seen corresponding path program 17 times [2021-08-12 19:28:57,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:57,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952244656] [2021-08-12 19:28:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:57,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:57,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952244656] [2021-08-12 19:28:57,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952244656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:57,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323987504] [2021-08-12 19:28:57,520 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 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 [2021-08-12 19:28:57,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 19:28:57,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:57,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:28:57,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:57,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323987504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:57,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:57,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-08-12 19:28:57,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788827754] [2021-08-12 19:28:57,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-08-12 19:28:57,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:57,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-12 19:28:57,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:28:57,883 INFO L87 Difference]: Start difference. First operand 265 states and 561 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:00,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:00,200 INFO L93 Difference]: Finished difference Result 1335 states and 2756 transitions. [2021-08-12 19:29:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-08-12 19:29:00,201 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-12 19:29:00,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:00,206 INFO L225 Difference]: With dead ends: 1335 [2021-08-12 19:29:00,206 INFO L226 Difference]: Without dead ends: 1110 [2021-08-12 19:29:00,209 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3798 ImplicationChecksByTransitivity, 1805.6ms TimeCoverageRelationStatistics Valid=3180, Invalid=9030, Unknown=0, NotChecked=0, Total=12210 [2021-08-12 19:29:00,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-08-12 19:29:00,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 180. [2021-08-12 19:29:00,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.0279329608938546) internal successors, (363), 179 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:00,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 363 transitions. [2021-08-12 19:29:00,242 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 363 transitions. Word has length 40 [2021-08-12 19:29:00,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:00,242 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 363 transitions. [2021-08-12 19:29:00,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:00,242 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 363 transitions. [2021-08-12 19:29:00,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-12 19:29:00,243 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:00,243 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:00,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:00,456 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:00,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:00,456 INFO L82 PathProgramCache]: Analyzing trace with hash -302152819, now seen corresponding path program 18 times [2021-08-12 19:29:00,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:00,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040411130] [2021-08-12 19:29:00,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:00,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:00,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040411130] [2021-08-12 19:29:00,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040411130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:00,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856685853] [2021-08-12 19:29:00,551 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 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 [2021-08-12 19:29:00,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-12 19:29:00,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:00,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:29:00,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:00,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856685853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:00,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:00,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-08-12 19:29:00,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484938665] [2021-08-12 19:29:00,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:29:00,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:00,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:29:00,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:29:00,922 INFO L87 Difference]: Start difference. First operand 180 states and 363 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:03,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:03,168 INFO L93 Difference]: Finished difference Result 832 states and 1637 transitions. [2021-08-12 19:29:03,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-08-12 19:29:03,169 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-12 19:29:03,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:03,172 INFO L225 Difference]: With dead ends: 832 [2021-08-12 19:29:03,172 INFO L226 Difference]: Without dead ends: 815 [2021-08-12 19:29:03,176 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 1813.8ms TimeCoverageRelationStatistics Valid=2606, Invalid=8314, Unknown=0, NotChecked=0, Total=10920 [2021-08-12 19:29:03,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2021-08-12 19:29:03,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 156. [2021-08-12 19:29:03,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.0387096774193547) internal successors, (316), 155 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:03,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 316 transitions. [2021-08-12 19:29:03,212 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 316 transitions. Word has length 40 [2021-08-12 19:29:03,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:03,212 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 316 transitions. [2021-08-12 19:29:03,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:03,212 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 316 transitions. [2021-08-12 19:29:03,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-12 19:29:03,214 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:03,214 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:03,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:03,415 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:03,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:03,416 INFO L82 PathProgramCache]: Analyzing trace with hash -78659707, now seen corresponding path program 19 times [2021-08-12 19:29:03,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:03,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003977803] [2021-08-12 19:29:03,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:03,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:03,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003977803] [2021-08-12 19:29:03,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003977803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:03,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826459450] [2021-08-12 19:29:03,507 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 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 [2021-08-12 19:29:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:03,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-12 19:29:03,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:03,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826459450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:03,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:03,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-12 19:29:03,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743386764] [2021-08-12 19:29:03,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:29:03,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:03,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:29:03,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:29:03,616 INFO L87 Difference]: Start difference. First operand 156 states and 316 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-08-12 19:29:03,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:03,805 INFO L93 Difference]: Finished difference Result 480 states and 943 transitions. [2021-08-12 19:29:03,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:29:03,806 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 42 [2021-08-12 19:29:03,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:03,807 INFO L225 Difference]: With dead ends: 480 [2021-08-12 19:29:03,807 INFO L226 Difference]: Without dead ends: 400 [2021-08-12 19:29:03,807 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:29:03,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-08-12 19:29:03,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 305. [2021-08-12 19:29:03,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.1315789473684212) internal successors, (648), 304 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:03,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 648 transitions. [2021-08-12 19:29:03,847 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 648 transitions. Word has length 42 [2021-08-12 19:29:03,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:03,847 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 648 transitions. [2021-08-12 19:29:03,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-08-12 19:29:03,847 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 648 transitions. [2021-08-12 19:29:03,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-12 19:29:03,848 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:03,848 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:04,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-12 19:29:04,071 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:04,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:04,072 INFO L82 PathProgramCache]: Analyzing trace with hash -729629309, now seen corresponding path program 20 times [2021-08-12 19:29:04,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:04,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724056094] [2021-08-12 19:29:04,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:04,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:04,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724056094] [2021-08-12 19:29:04,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724056094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:04,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749278238] [2021-08-12 19:29:04,251 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 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 [2021-08-12 19:29:04,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:29:04,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:04,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:29:04,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:04,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749278238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:04,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:04,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-08-12 19:29:04,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90341234] [2021-08-12 19:29:04,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-08-12 19:29:04,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:04,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-12 19:29:04,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:29:04,673 INFO L87 Difference]: Start difference. First operand 305 states and 648 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:07,918 INFO L93 Difference]: Finished difference Result 1644 states and 3390 transitions. [2021-08-12 19:29:07,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-08-12 19:29:07,918 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-12 19:29:07,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:07,924 INFO L225 Difference]: With dead ends: 1644 [2021-08-12 19:29:07,924 INFO L226 Difference]: Without dead ends: 1359 [2021-08-12 19:29:07,926 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5875 ImplicationChecksByTransitivity, 2483.8ms TimeCoverageRelationStatistics Valid=4657, Invalid=13165, Unknown=0, NotChecked=0, Total=17822 [2021-08-12 19:29:07,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-08-12 19:29:07,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 202. [2021-08-12 19:29:07,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.0348258706467663) internal successors, (409), 201 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:07,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 409 transitions. [2021-08-12 19:29:07,967 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 409 transitions. Word has length 44 [2021-08-12 19:29:07,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:07,967 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 409 transitions. [2021-08-12 19:29:07,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:07,968 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 409 transitions. [2021-08-12 19:29:07,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-12 19:29:07,968 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:07,968 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:08,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-12 19:29:08,185 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:08,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:08,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1199920525, now seen corresponding path program 21 times [2021-08-12 19:29:08,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:08,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352130583] [2021-08-12 19:29:08,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:08,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:08,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352130583] [2021-08-12 19:29:08,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352130583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:08,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175267991] [2021-08-12 19:29:08,305 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 [2021-08-12 19:29:08,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-12 19:29:08,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:08,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:29:08,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:08,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175267991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:08,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:08,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-08-12 19:29:08,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243322455] [2021-08-12 19:29:08,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-08-12 19:29:08,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:08,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-12 19:29:08,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:29:08,687 INFO L87 Difference]: Start difference. First operand 202 states and 409 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:11,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:11,517 INFO L93 Difference]: Finished difference Result 1032 states and 2037 transitions. [2021-08-12 19:29:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-08-12 19:29:11,517 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-12 19:29:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:11,521 INFO L225 Difference]: With dead ends: 1032 [2021-08-12 19:29:11,521 INFO L226 Difference]: Without dead ends: 1015 [2021-08-12 19:29:11,522 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5830 ImplicationChecksByTransitivity, 2256.7ms TimeCoverageRelationStatistics Valid=3791, Invalid=12211, Unknown=0, NotChecked=0, Total=16002 [2021-08-12 19:29:11,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2021-08-12 19:29:11,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 174. [2021-08-12 19:29:11,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.046242774566474) internal successors, (354), 173 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:11,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 354 transitions. [2021-08-12 19:29:11,554 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 354 transitions. Word has length 44 [2021-08-12 19:29:11,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:11,554 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 354 transitions. [2021-08-12 19:29:11,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 354 transitions. [2021-08-12 19:29:11,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-12 19:29:11,555 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:11,555 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:11,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:11,769 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:11,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:11,769 INFO L82 PathProgramCache]: Analyzing trace with hash -2016813247, now seen corresponding path program 22 times [2021-08-12 19:29:11,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:11,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126574776] [2021-08-12 19:29:11,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:11,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:11,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126574776] [2021-08-12 19:29:11,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126574776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:11,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694458625] [2021-08-12 19:29:11,864 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 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 [2021-08-12 19:29:11,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:29:11,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:11,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-12 19:29:11,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:11,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694458625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:11,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:11,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-12 19:29:11,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502852242] [2021-08-12 19:29:11,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:29:11,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:11,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:29:11,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:29:11,956 INFO L87 Difference]: Start difference. First operand 174 states and 354 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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) [2021-08-12 19:29:12,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:12,199 INFO L93 Difference]: Finished difference Result 539 states and 1060 transitions. [2021-08-12 19:29:12,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:29:12,200 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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 46 [2021-08-12 19:29:12,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:12,202 INFO L225 Difference]: With dead ends: 539 [2021-08-12 19:29:12,202 INFO L226 Difference]: Without dead ends: 453 [2021-08-12 19:29:12,202 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:29:12,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-08-12 19:29:12,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 345. [2021-08-12 19:29:12,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.136627906976744) internal successors, (735), 344 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:12,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 735 transitions. [2021-08-12 19:29:12,255 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 735 transitions. Word has length 46 [2021-08-12 19:29:12,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:12,255 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 735 transitions. [2021-08-12 19:29:12,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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) [2021-08-12 19:29:12,255 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 735 transitions. [2021-08-12 19:29:12,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-12 19:29:12,256 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:12,256 INFO L550 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:12,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-12 19:29:12,465 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:12,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:12,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1932635711, now seen corresponding path program 23 times [2021-08-12 19:29:12,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:12,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586345408] [2021-08-12 19:29:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:12,706 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:12,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:12,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586345408] [2021-08-12 19:29:12,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586345408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:12,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138227128] [2021-08-12 19:29:12,706 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 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 [2021-08-12 19:29:12,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-12 19:29:12,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:12,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:29:12,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:13,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138227128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:13,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:13,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-08-12 19:29:13,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770089568] [2021-08-12 19:29:13,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-08-12 19:29:13,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:13,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-12 19:29:13,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:29:13,185 INFO L87 Difference]: Start difference. First operand 345 states and 735 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:17,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:17,167 INFO L93 Difference]: Finished difference Result 1981 states and 4080 transitions. [2021-08-12 19:29:17,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-08-12 19:29:17,168 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-12 19:29:17,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:17,174 INFO L225 Difference]: With dead ends: 1981 [2021-08-12 19:29:17,174 INFO L226 Difference]: Without dead ends: 1630 [2021-08-12 19:29:17,176 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8718 ImplicationChecksByTransitivity, 3027.1ms TimeCoverageRelationStatistics Valid=6597, Invalid=18525, Unknown=0, NotChecked=0, Total=25122 [2021-08-12 19:29:17,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-08-12 19:29:17,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 224. [2021-08-12 19:29:17,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.0403587443946187) internal successors, (455), 223 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:17,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 455 transitions. [2021-08-12 19:29:17,222 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 455 transitions. Word has length 48 [2021-08-12 19:29:17,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:17,222 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 455 transitions. [2021-08-12 19:29:17,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:17,222 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 455 transitions. [2021-08-12 19:29:17,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-12 19:29:17,223 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:17,223 INFO L550 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:17,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:17,437 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:17,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:17,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1888843917, now seen corresponding path program 24 times [2021-08-12 19:29:17,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:17,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795226596] [2021-08-12 19:29:17,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:17,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:17,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795226596] [2021-08-12 19:29:17,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795226596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:17,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505649278] [2021-08-12 19:29:17,560 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 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 [2021-08-12 19:29:17,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-12 19:29:17,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:17,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:29:17,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:18,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505649278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:18,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:18,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-08-12 19:29:18,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089078444] [2021-08-12 19:29:18,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-08-12 19:29:18,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:18,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-12 19:29:18,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:29:18,028 INFO L87 Difference]: Start difference. First operand 224 states and 455 transitions. Second operand has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:21,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:21,459 INFO L93 Difference]: Finished difference Result 1254 states and 2481 transitions. [2021-08-12 19:29:21,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-08-12 19:29:21,460 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-12 19:29:21,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:21,463 INFO L225 Difference]: With dead ends: 1254 [2021-08-12 19:29:21,463 INFO L226 Difference]: Without dead ends: 1237 [2021-08-12 19:29:21,464 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8653 ImplicationChecksByTransitivity, 2769.9ms TimeCoverageRelationStatistics Valid=5342, Invalid=17308, Unknown=0, NotChecked=0, Total=22650 [2021-08-12 19:29:21,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-08-12 19:29:21,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 192. [2021-08-12 19:29:21,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.0523560209424083) internal successors, (392), 191 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:21,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 392 transitions. [2021-08-12 19:29:21,498 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 392 transitions. Word has length 48 [2021-08-12 19:29:21,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:21,498 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 392 transitions. [2021-08-12 19:29:21,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:21,499 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 392 transitions. [2021-08-12 19:29:21,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-12 19:29:21,499 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:21,499 INFO L550 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:21,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-12 19:29:21,709 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:21,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:21,709 INFO L82 PathProgramCache]: Analyzing trace with hash 914329853, now seen corresponding path program 25 times [2021-08-12 19:29:21,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:21,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451228266] [2021-08-12 19:29:21,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:21,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:21,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451228266] [2021-08-12 19:29:21,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451228266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:21,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006271599] [2021-08-12 19:29:21,814 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 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 [2021-08-12 19:29:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:21,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:29:21,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:21,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006271599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:21,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:21,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-08-12 19:29:21,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412398232] [2021-08-12 19:29:21,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:29:21,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:21,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:29:21,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:29:21,923 INFO L87 Difference]: Start difference. First operand 192 states and 392 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 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) [2021-08-12 19:29:22,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:22,254 INFO L93 Difference]: Finished difference Result 598 states and 1177 transitions. [2021-08-12 19:29:22,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:29:22,254 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 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 50 [2021-08-12 19:29:22,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:22,256 INFO L225 Difference]: With dead ends: 598 [2021-08-12 19:29:22,256 INFO L226 Difference]: Without dead ends: 506 [2021-08-12 19:29:22,257 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:29:22,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-08-12 19:29:22,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 385. [2021-08-12 19:29:22,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.140625) internal successors, (822), 384 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 822 transitions. [2021-08-12 19:29:22,320 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 822 transitions. Word has length 50 [2021-08-12 19:29:22,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:22,320 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 822 transitions. [2021-08-12 19:29:22,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 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) [2021-08-12 19:29:22,320 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 822 transitions. [2021-08-12 19:29:22,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-12 19:29:22,321 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:22,321 INFO L550 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:22,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-12 19:29:22,523 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:22,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:22,523 INFO L82 PathProgramCache]: Analyzing trace with hash 2068558075, now seen corresponding path program 26 times [2021-08-12 19:29:22,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:22,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689473160] [2021-08-12 19:29:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:22,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:22,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689473160] [2021-08-12 19:29:22,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689473160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:22,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396899564] [2021-08-12 19:29:22,783 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 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 [2021-08-12 19:29:22,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:29:22,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:22,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 19:29:22,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:23,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396899564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:23,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:23,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-08-12 19:29:23,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454294434] [2021-08-12 19:29:23,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-08-12 19:29:23,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:23,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-12 19:29:23,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1694, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 19:29:23,412 INFO L87 Difference]: Start difference. First operand 385 states and 822 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:28,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:28,747 INFO L93 Difference]: Finished difference Result 2346 states and 4826 transitions. [2021-08-12 19:29:28,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-08-12 19:29:28,747 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-12 19:29:28,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:28,753 INFO L225 Difference]: With dead ends: 2346 [2021-08-12 19:29:28,753 INFO L226 Difference]: Without dead ends: 1923 [2021-08-12 19:29:28,755 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12499 ImplicationChecksByTransitivity, 3884.2ms TimeCoverageRelationStatistics Valid=9089, Invalid=25321, Unknown=0, NotChecked=0, Total=34410 [2021-08-12 19:29:28,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-08-12 19:29:28,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 246. [2021-08-12 19:29:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0448979591836736) internal successors, (501), 245 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:28,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 501 transitions. [2021-08-12 19:29:28,800 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 501 transitions. Word has length 52 [2021-08-12 19:29:28,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:28,800 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 501 transitions. [2021-08-12 19:29:28,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:28,801 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 501 transitions. [2021-08-12 19:29:28,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-12 19:29:28,801 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:28,801 INFO L550 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:29,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-12 19:29:29,026 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:29,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:29,026 INFO L82 PathProgramCache]: Analyzing trace with hash -275960691, now seen corresponding path program 27 times [2021-08-12 19:29:29,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:29,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173792985] [2021-08-12 19:29:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:29,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:29,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173792985] [2021-08-12 19:29:29,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173792985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:29,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699064833] [2021-08-12 19:29:29,184 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 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 [2021-08-12 19:29:29,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-12 19:29:29,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:29,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 19:29:29,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:29,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699064833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:29,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:29,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2021-08-12 19:29:29,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767624742] [2021-08-12 19:29:29,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-08-12 19:29:29,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:29,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-12 19:29:29,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:29:29,774 INFO L87 Difference]: Start difference. First operand 246 states and 501 transitions. Second operand has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:34,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:34,389 INFO L93 Difference]: Finished difference Result 1498 states and 2969 transitions. [2021-08-12 19:29:34,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-08-12 19:29:34,390 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-12 19:29:34,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:34,395 INFO L225 Difference]: With dead ends: 1498 [2021-08-12 19:29:34,395 INFO L226 Difference]: Without dead ends: 1481 [2021-08-12 19:29:34,397 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12396 ImplicationChecksByTransitivity, 3608.5ms TimeCoverageRelationStatistics Valid=7328, Invalid=23824, Unknown=0, NotChecked=0, Total=31152 [2021-08-12 19:29:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-08-12 19:29:34,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 210. [2021-08-12 19:29:34,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.0574162679425836) internal successors, (430), 209 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:34,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 430 transitions. [2021-08-12 19:29:34,443 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 430 transitions. Word has length 52 [2021-08-12 19:29:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:34,443 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 430 transitions. [2021-08-12 19:29:34,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 430 transitions. [2021-08-12 19:29:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-12 19:29:34,444 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:34,444 INFO L550 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:34,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:34,661 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:34,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:34,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1608264519, now seen corresponding path program 28 times [2021-08-12 19:29:34,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:34,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557933220] [2021-08-12 19:29:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:34,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:34,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557933220] [2021-08-12 19:29:34,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557933220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:34,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362102201] [2021-08-12 19:29:34,790 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 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 [2021-08-12 19:29:34,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:29:34,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:34,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-12 19:29:34,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:34,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362102201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:34,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:34,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-12 19:29:34,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873120916] [2021-08-12 19:29:34,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:29:34,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:34,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:29:34,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:29:34,916 INFO L87 Difference]: Start difference. First operand 210 states and 430 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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) [2021-08-12 19:29:35,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:35,336 INFO L93 Difference]: Finished difference Result 657 states and 1294 transitions. [2021-08-12 19:29:35,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:29:35,336 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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 54 [2021-08-12 19:29:35,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:35,338 INFO L225 Difference]: With dead ends: 657 [2021-08-12 19:29:35,338 INFO L226 Difference]: Without dead ends: 559 [2021-08-12 19:29:35,339 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:29:35,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-08-12 19:29:35,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 425. [2021-08-12 19:29:35,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.143867924528302) internal successors, (909), 424 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:35,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 909 transitions. [2021-08-12 19:29:35,407 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 909 transitions. Word has length 54 [2021-08-12 19:29:35,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:35,407 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 909 transitions. [2021-08-12 19:29:35,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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) [2021-08-12 19:29:35,407 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 909 transitions. [2021-08-12 19:29:35,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-12 19:29:35,408 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:35,408 INFO L550 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:35,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-12 19:29:35,613 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:35,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:35,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1640220087, now seen corresponding path program 29 times [2021-08-12 19:29:35,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:35,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883598173] [2021-08-12 19:29:35,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:35,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:35,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883598173] [2021-08-12 19:29:35,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883598173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:35,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152124720] [2021-08-12 19:29:35,919 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 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 [2021-08-12 19:29:35,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-12 19:29:35,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:35,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-12 19:29:35,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:36,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152124720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:36,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:36,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-08-12 19:29:36,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838305192] [2021-08-12 19:29:36,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-08-12 19:29:36,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:36,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-12 19:29:36,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2010, Unknown=0, NotChecked=0, Total=2450 [2021-08-12 19:29:36,554 INFO L87 Difference]: Start difference. First operand 425 states and 909 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:43,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:43,228 INFO L93 Difference]: Finished difference Result 2739 states and 5628 transitions. [2021-08-12 19:29:43,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-08-12 19:29:43,228 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-12 19:29:43,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:43,236 INFO L225 Difference]: With dead ends: 2739 [2021-08-12 19:29:43,236 INFO L226 Difference]: Without dead ends: 2238 [2021-08-12 19:29:43,239 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17409 ImplicationChecksByTransitivity, 4676.1ms TimeCoverageRelationStatistics Valid=12230, Invalid=33780, Unknown=0, NotChecked=0, Total=46010 [2021-08-12 19:29:43,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-08-12 19:29:43,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 268. [2021-08-12 19:29:43,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.048689138576779) internal successors, (547), 267 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:43,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 547 transitions. [2021-08-12 19:29:43,304 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 547 transitions. Word has length 56 [2021-08-12 19:29:43,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:43,304 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 547 transitions. [2021-08-12 19:29:43,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:43,304 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 547 transitions. [2021-08-12 19:29:43,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-12 19:29:43,305 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:43,305 INFO L550 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:43,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:43,529 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:43,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:43,530 INFO L82 PathProgramCache]: Analyzing trace with hash 205238669, now seen corresponding path program 30 times [2021-08-12 19:29:43,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:43,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358194377] [2021-08-12 19:29:43,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:43,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:43,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358194377] [2021-08-12 19:29:43,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358194377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:43,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285061894] [2021-08-12 19:29:43,683 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 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 [2021-08-12 19:29:43,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-08-12 19:29:43,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:43,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-12 19:29:43,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:44,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285061894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:44,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:44,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 38 [2021-08-12 19:29:44,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009107790] [2021-08-12 19:29:44,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-08-12 19:29:44,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:44,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-12 19:29:44,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:29:44,310 INFO L87 Difference]: Start difference. First operand 268 states and 547 transitions. Second operand has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:50,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:50,049 INFO L93 Difference]: Finished difference Result 1764 states and 3501 transitions. [2021-08-12 19:29:50,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-08-12 19:29:50,058 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-12 19:29:50,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:50,062 INFO L225 Difference]: With dead ends: 1764 [2021-08-12 19:29:50,062 INFO L226 Difference]: Without dead ends: 1747 [2021-08-12 19:29:50,065 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17241 ImplicationChecksByTransitivity, 4310.1ms TimeCoverageRelationStatistics Valid=9824, Invalid=31996, Unknown=0, NotChecked=0, Total=41820 [2021-08-12 19:29:50,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-08-12 19:29:50,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 228. [2021-08-12 19:29:50,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.0616740088105727) internal successors, (468), 227 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:50,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 468 transitions. [2021-08-12 19:29:50,122 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 468 transitions. Word has length 56 [2021-08-12 19:29:50,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:50,122 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 468 transitions. [2021-08-12 19:29:50,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:50,122 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 468 transitions. [2021-08-12 19:29:50,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-12 19:29:50,123 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:50,123 INFO L550 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:50,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-12 19:29:50,323 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:50,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:50,324 INFO L82 PathProgramCache]: Analyzing trace with hash -924210571, now seen corresponding path program 31 times [2021-08-12 19:29:50,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:50,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547639652] [2021-08-12 19:29:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:50,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:50,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547639652] [2021-08-12 19:29:50,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547639652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:50,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596785027] [2021-08-12 19:29:50,459 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 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 [2021-08-12 19:29:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:50,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-12 19:29:50,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:50,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596785027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:50,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:50,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-12 19:29:50,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811085621] [2021-08-12 19:29:50,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:29:50,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:50,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:29:50,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:29:50,585 INFO L87 Difference]: Start difference. First operand 228 states and 468 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:51,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:51,170 INFO L93 Difference]: Finished difference Result 716 states and 1411 transitions. [2021-08-12 19:29:51,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:29:51,170 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-08-12 19:29:51,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:51,173 INFO L225 Difference]: With dead ends: 716 [2021-08-12 19:29:51,173 INFO L226 Difference]: Without dead ends: 612 [2021-08-12 19:29:51,173 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:29:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-08-12 19:29:51,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 465. [2021-08-12 19:29:51,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.146551724137931) internal successors, (996), 464 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:51,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 996 transitions. [2021-08-12 19:29:51,251 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 996 transitions. Word has length 58 [2021-08-12 19:29:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:51,252 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 996 transitions. [2021-08-12 19:29:51,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:51,252 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 996 transitions. [2021-08-12 19:29:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-12 19:29:51,253 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:51,253 INFO L550 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:51,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-12 19:29:51,476 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:51,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:51,476 INFO L82 PathProgramCache]: Analyzing trace with hash -418583437, now seen corresponding path program 32 times [2021-08-12 19:29:51,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:51,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691723829] [2021-08-12 19:29:51,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:51,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:51,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691723829] [2021-08-12 19:29:51,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691723829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:51,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685294925] [2021-08-12 19:29:51,863 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 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 [2021-08-12 19:29:51,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:29:51,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:51,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:29:51,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:52,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685294925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:52,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:52,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-08-12 19:29:52,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709811152] [2021-08-12 19:29:52,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-08-12 19:29:52,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:52,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-12 19:29:52,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2353, Unknown=0, NotChecked=0, Total=2862 [2021-08-12 19:29:52,653 INFO L87 Difference]: Start difference. First operand 465 states and 996 transitions. Second operand has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:01,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:30:01,036 INFO L93 Difference]: Finished difference Result 3160 states and 6486 transitions. [2021-08-12 19:30:01,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-08-12 19:30:01,036 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-12 19:30:01,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:30:01,041 INFO L225 Difference]: With dead ends: 3160 [2021-08-12 19:30:01,041 INFO L226 Difference]: Without dead ends: 2575 [2021-08-12 19:30:01,044 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23656 ImplicationChecksByTransitivity, 5821.3ms TimeCoverageRelationStatistics Valid=16125, Invalid=44145, Unknown=0, NotChecked=0, Total=60270 [2021-08-12 19:30:01,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2575 states. [2021-08-12 19:30:01,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2575 to 290. [2021-08-12 19:30:01,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.0519031141868513) internal successors, (593), 289 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:01,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 593 transitions. [2021-08-12 19:30:01,139 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 593 transitions. Word has length 60 [2021-08-12 19:30:01,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:30:01,139 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 593 transitions. [2021-08-12 19:30:01,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:01,140 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 593 transitions. [2021-08-12 19:30:01,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-12 19:30:01,140 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:30:01,140 INFO L550 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:30:01,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-12 19:30:01,351 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:30:01,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:30:01,352 INFO L82 PathProgramCache]: Analyzing trace with hash 333465485, now seen corresponding path program 33 times [2021-08-12 19:30:01,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:30:01,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130140719] [2021-08-12 19:30:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:30:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:01,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:30:01,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130140719] [2021-08-12 19:30:01,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130140719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:01,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972806221] [2021-08-12 19:30:01,528 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 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 [2021-08-12 19:30:01,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-08-12 19:30:01,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:30:01,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:30:01,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:30:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:02,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972806221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:02,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:30:02,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 41 [2021-08-12 19:30:02,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353968451] [2021-08-12 19:30:02,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-08-12 19:30:02,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:30:02,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-12 19:30:02,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:30:02,213 INFO L87 Difference]: Start difference. First operand 290 states and 593 transitions. Second operand has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:09,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:30:09,706 INFO L93 Difference]: Finished difference Result 2052 states and 4077 transitions. [2021-08-12 19:30:09,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-08-12 19:30:09,706 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-12 19:30:09,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:30:09,710 INFO L225 Difference]: With dead ends: 2052 [2021-08-12 19:30:09,710 INFO L226 Difference]: Without dead ends: 2035 [2021-08-12 19:30:09,712 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23386 ImplicationChecksByTransitivity, 5413.1ms TimeCoverageRelationStatistics Valid=12911, Invalid=42079, Unknown=0, NotChecked=0, Total=54990 [2021-08-12 19:30:09,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-08-12 19:30:09,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 246. [2021-08-12 19:30:09,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0653061224489795) internal successors, (506), 245 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:09,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 506 transitions. [2021-08-12 19:30:09,785 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 506 transitions. Word has length 60 [2021-08-12 19:30:09,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:30:09,785 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 506 transitions. [2021-08-12 19:30:09,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:09,785 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 506 transitions. [2021-08-12 19:30:09,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-12 19:30:09,786 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:30:09,786 INFO L550 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:30:09,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-12 19:30:09,996 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:30:09,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:30:09,996 INFO L82 PathProgramCache]: Analyzing trace with hash 545526321, now seen corresponding path program 34 times [2021-08-12 19:30:09,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:30:09,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215558438] [2021-08-12 19:30:09,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:30:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:10,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:30:10,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215558438] [2021-08-12 19:30:10,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215558438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:10,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320583769] [2021-08-12 19:30:10,140 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 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 [2021-08-12 19:30:10,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:30:10,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:30:10,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-12 19:30:10,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:30:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:10,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320583769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:10,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:30:10,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-12 19:30:10,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069154592] [2021-08-12 19:30:10,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:30:10,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:30:10,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:30:10,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:30:10,287 INFO L87 Difference]: Start difference. First operand 246 states and 506 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:11,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:30:11,129 INFO L93 Difference]: Finished difference Result 775 states and 1528 transitions. [2021-08-12 19:30:11,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:30:11,129 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-12 19:30:11,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:30:11,131 INFO L225 Difference]: With dead ends: 775 [2021-08-12 19:30:11,131 INFO L226 Difference]: Without dead ends: 665 [2021-08-12 19:30:11,131 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:30:11,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-08-12 19:30:11,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 505. [2021-08-12 19:30:11,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1488095238095237) internal successors, (1083), 504 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:11,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1083 transitions. [2021-08-12 19:30:11,236 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1083 transitions. Word has length 62 [2021-08-12 19:30:11,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:30:11,237 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1083 transitions. [2021-08-12 19:30:11,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:11,237 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1083 transitions. [2021-08-12 19:30:11,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-12 19:30:11,238 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:30:11,238 INFO L550 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:30:11,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-12 19:30:11,445 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:30:11,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:30:11,445 INFO L82 PathProgramCache]: Analyzing trace with hash 387589423, now seen corresponding path program 35 times [2021-08-12 19:30:11,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:30:11,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954939946] [2021-08-12 19:30:11,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:30:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:11,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:30:11,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954939946] [2021-08-12 19:30:11,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954939946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:11,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154158884] [2021-08-12 19:30:11,824 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 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 [2021-08-12 19:30:11,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-08-12 19:30:11,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:30:11,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:30:11,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:30:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:12,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154158884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:12,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:30:12,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 57 [2021-08-12 19:30:12,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351466913] [2021-08-12 19:30:12,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-08-12 19:30:12,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:30:12,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-08-12 19:30:12,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=2723, Unknown=0, NotChecked=0, Total=3306 [2021-08-12 19:30:12,626 INFO L87 Difference]: Start difference. First operand 505 states and 1083 transitions. Second operand has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:23,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:30:23,571 INFO L93 Difference]: Finished difference Result 3609 states and 7400 transitions. [2021-08-12 19:30:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-08-12 19:30:23,572 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-08-12 19:30:23,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:30:23,577 INFO L225 Difference]: With dead ends: 3609 [2021-08-12 19:30:23,577 INFO L226 Difference]: Without dead ends: 2934 [2021-08-12 19:30:23,580 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31467 ImplicationChecksByTransitivity, 7273.3ms TimeCoverageRelationStatistics Valid=20887, Invalid=56675, Unknown=0, NotChecked=0, Total=77562 [2021-08-12 19:30:23,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-08-12 19:30:23,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 312. [2021-08-12 19:30:23,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.054662379421222) internal successors, (639), 311 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 639 transitions. [2021-08-12 19:30:23,678 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 639 transitions. Word has length 64 [2021-08-12 19:30:23,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:30:23,679 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 639 transitions. [2021-08-12 19:30:23,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:23,680 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 639 transitions. [2021-08-12 19:30:23,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-12 19:30:23,681 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:30:23,681 INFO L550 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:30:23,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-12 19:30:23,885 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:30:23,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:30:23,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1658179955, now seen corresponding path program 36 times [2021-08-12 19:30:23,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:30:23,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539453719] [2021-08-12 19:30:23,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:30:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:24,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:30:24,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539453719] [2021-08-12 19:30:24,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539453719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:24,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047981218] [2021-08-12 19:30:24,092 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 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 [2021-08-12 19:30:24,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-08-12 19:30:24,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:30:24,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:30:24,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:30:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:24,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047981218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:24,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:30:24,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 44 [2021-08-12 19:30:24,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122456343] [2021-08-12 19:30:24,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-08-12 19:30:24,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:30:24,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-12 19:30:24,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 19:30:24,877 INFO L87 Difference]: Start difference. First operand 312 states and 639 transitions. Second operand has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:33,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:30:33,780 INFO L93 Difference]: Finished difference Result 2362 states and 4697 transitions. [2021-08-12 19:30:33,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-08-12 19:30:33,780 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-08-12 19:30:33,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:30:33,785 INFO L225 Difference]: With dead ends: 2362 [2021-08-12 19:30:33,785 INFO L226 Difference]: Without dead ends: 2345 [2021-08-12 19:30:33,789 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31046 ImplicationChecksByTransitivity, 6431.2ms TimeCoverageRelationStatistics Valid=16676, Invalid=54346, Unknown=0, NotChecked=0, Total=71022 [2021-08-12 19:30:33,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-08-12 19:30:33,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 264. [2021-08-12 19:30:33,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.068441064638783) internal successors, (544), 263 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:33,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 544 transitions. [2021-08-12 19:30:33,912 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 544 transitions. Word has length 64 [2021-08-12 19:30:33,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:30:33,913 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 544 transitions. [2021-08-12 19:30:33,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:33,913 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 544 transitions. [2021-08-12 19:30:33,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-12 19:30:33,913 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:30:33,914 INFO L550 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:30:34,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-12 19:30:34,116 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:30:34,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:30:34,116 INFO L82 PathProgramCache]: Analyzing trace with hash -2111435795, now seen corresponding path program 37 times [2021-08-12 19:30:34,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:30:34,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319558328] [2021-08-12 19:30:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:30:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:34,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:30:34,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319558328] [2021-08-12 19:30:34,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319558328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:34,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026035425] [2021-08-12 19:30:34,276 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 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 [2021-08-12 19:30:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:34,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-12 19:30:34,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:30:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:34,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026035425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:34,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:30:34,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-08-12 19:30:34,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058563839] [2021-08-12 19:30:34,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:30:34,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:30:34,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:30:34,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:30:34,416 INFO L87 Difference]: Start difference. First operand 264 states and 544 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:35,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:30:35,204 INFO L93 Difference]: Finished difference Result 834 states and 1645 transitions. [2021-08-12 19:30:35,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:30:35,205 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-12 19:30:35,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:30:35,207 INFO L225 Difference]: With dead ends: 834 [2021-08-12 19:30:35,207 INFO L226 Difference]: Without dead ends: 718 [2021-08-12 19:30:35,207 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:30:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-08-12 19:30:35,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 545. [2021-08-12 19:30:35,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 2.150735294117647) internal successors, (1170), 544 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:35,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1170 transitions. [2021-08-12 19:30:35,338 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1170 transitions. Word has length 66 [2021-08-12 19:30:35,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:30:35,339 INFO L482 AbstractCegarLoop]: Abstraction has 545 states and 1170 transitions. [2021-08-12 19:30:35,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:35,339 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1170 transitions. [2021-08-12 19:30:35,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-08-12 19:30:35,339 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:30:35,339 INFO L550 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:30:35,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-12 19:30:35,546 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:30:35,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:30:35,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1230925803, now seen corresponding path program 38 times [2021-08-12 19:30:35,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:30:35,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661414779] [2021-08-12 19:30:35,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:30:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:35,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:30:35,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661414779] [2021-08-12 19:30:35,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661414779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:35,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618590964] [2021-08-12 19:30:35,978 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 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 [2021-08-12 19:30:36,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:30:36,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:30:36,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-12 19:30:36,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:30:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:36,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618590964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:36,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:30:36,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2021-08-12 19:30:36,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492309735] [2021-08-12 19:30:36,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-08-12 19:30:36,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:30:36,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-08-12 19:30:36,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=3120, Unknown=0, NotChecked=0, Total=3782 [2021-08-12 19:30:36,897 INFO L87 Difference]: Start difference. First operand 545 states and 1170 transitions. Second operand has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:49,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:30:49,912 INFO L93 Difference]: Finished difference Result 4086 states and 8370 transitions. [2021-08-12 19:30:49,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2021-08-12 19:30:49,913 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-08-12 19:30:49,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:30:49,921 INFO L225 Difference]: With dead ends: 4086 [2021-08-12 19:30:49,921 INFO L226 Difference]: Without dead ends: 3315 [2021-08-12 19:30:49,927 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41086 ImplicationChecksByTransitivity, 8402.8ms TimeCoverageRelationStatistics Valid=26637, Invalid=71645, Unknown=0, NotChecked=0, Total=98282 [2021-08-12 19:30:49,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2021-08-12 19:30:50,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 334. [2021-08-12 19:30:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.057057057057057) internal successors, (685), 333 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:50,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 685 transitions. [2021-08-12 19:30:50,087 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 685 transitions. Word has length 68 [2021-08-12 19:30:50,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:30:50,087 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 685 transitions. [2021-08-12 19:30:50,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:50,088 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 685 transitions. [2021-08-12 19:30:50,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-08-12 19:30:50,088 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:30:50,088 INFO L550 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:30:50,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:30:50,305 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:30:50,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:30:50,305 INFO L82 PathProgramCache]: Analyzing trace with hash -868702579, now seen corresponding path program 39 times [2021-08-12 19:30:50,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:30:50,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126973081] [2021-08-12 19:30:50,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:30:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:50,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:30:50,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126973081] [2021-08-12 19:30:50,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126973081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:50,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836713904] [2021-08-12 19:30:50,503 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 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 [2021-08-12 19:30:50,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-08-12 19:30:50,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:30:50,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-12 19:30:50,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:30:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:51,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836713904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:51,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:30:51,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31] total 47 [2021-08-12 19:30:51,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528132217] [2021-08-12 19:30:51,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-08-12 19:30:51,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:30:51,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-12 19:30:51,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1804, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 19:30:51,302 INFO L87 Difference]: Start difference. First operand 334 states and 685 transitions. Second operand has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:02,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:02,045 INFO L93 Difference]: Finished difference Result 2694 states and 5361 transitions. [2021-08-12 19:31:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-08-12 19:31:02,046 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-08-12 19:31:02,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:02,052 INFO L225 Difference]: With dead ends: 2694 [2021-08-12 19:31:02,052 INFO L226 Difference]: Without dead ends: 2677 [2021-08-12 19:31:02,057 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40452 ImplicationChecksByTransitivity, 7399.2ms TimeCoverageRelationStatistics Valid=21212, Invalid=69088, Unknown=0, NotChecked=0, Total=90300 [2021-08-12 19:31:02,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-08-12 19:31:02,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 282. [2021-08-12 19:31:02,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.0711743772241995) internal successors, (582), 281 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:02,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 582 transitions. [2021-08-12 19:31:02,234 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 582 transitions. Word has length 68 [2021-08-12 19:31:02,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:02,234 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 582 transitions. [2021-08-12 19:31:02,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:02,234 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 582 transitions. [2021-08-12 19:31:02,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-12 19:31:02,235 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:02,235 INFO L550 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:02,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:02,458 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:02,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:02,458 INFO L82 PathProgramCache]: Analyzing trace with hash 880973737, now seen corresponding path program 40 times [2021-08-12 19:31:02,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:02,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370032440] [2021-08-12 19:31:02,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:02,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:02,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370032440] [2021-08-12 19:31:02,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370032440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:02,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321613627] [2021-08-12 19:31:02,636 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 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 [2021-08-12 19:31:02,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:31:02,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:02,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-12 19:31:02,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:02,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321613627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:02,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:02,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-08-12 19:31:02,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579437374] [2021-08-12 19:31:02,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:31:02,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:02,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:31:02,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:31:02,795 INFO L87 Difference]: Start difference. First operand 282 states and 582 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:03,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:03,747 INFO L93 Difference]: Finished difference Result 893 states and 1762 transitions. [2021-08-12 19:31:03,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:31:03,748 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-12 19:31:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:03,750 INFO L225 Difference]: With dead ends: 893 [2021-08-12 19:31:03,750 INFO L226 Difference]: Without dead ends: 771 [2021-08-12 19:31:03,751 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:31:03,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-08-12 19:31:03,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 585. [2021-08-12 19:31:03,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.1523972602739727) internal successors, (1257), 584 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:03,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1257 transitions. [2021-08-12 19:31:03,924 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1257 transitions. Word has length 70 [2021-08-12 19:31:03,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:03,925 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1257 transitions. [2021-08-12 19:31:03,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:03,925 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1257 transitions. [2021-08-12 19:31:03,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-12 19:31:03,926 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:03,926 INFO L550 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:04,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-12 19:31:04,134 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:04,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:04,135 INFO L82 PathProgramCache]: Analyzing trace with hash 550292647, now seen corresponding path program 41 times [2021-08-12 19:31:04,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:04,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579962199] [2021-08-12 19:31:04,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:04,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:04,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579962199] [2021-08-12 19:31:04,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579962199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:04,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399410041] [2021-08-12 19:31:04,639 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 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 [2021-08-12 19:31:04,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-08-12 19:31:04,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:04,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:31:04,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:05,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399410041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:05,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:05,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-08-12 19:31:05,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938006044] [2021-08-12 19:31:05,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-08-12 19:31:05,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:05,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-12 19:31:05,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=3544, Unknown=0, NotChecked=0, Total=4290 [2021-08-12 19:31:05,618 INFO L87 Difference]: Start difference. First operand 585 states and 1257 transitions. Second operand has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:20,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:20,895 INFO L93 Difference]: Finished difference Result 4591 states and 9396 transitions. [2021-08-12 19:31:20,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2021-08-12 19:31:20,895 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-12 19:31:20,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:20,902 INFO L225 Difference]: With dead ends: 4591 [2021-08-12 19:31:20,902 INFO L226 Difference]: Without dead ends: 3718 [2021-08-12 19:31:20,909 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52776 ImplicationChecksByTransitivity, 9917.6ms TimeCoverageRelationStatistics Valid=33504, Invalid=89346, Unknown=0, NotChecked=0, Total=122850 [2021-08-12 19:31:20,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2021-08-12 19:31:21,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 356. [2021-08-12 19:31:21,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.0591549295774647) internal successors, (731), 355 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:21,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 731 transitions. [2021-08-12 19:31:21,101 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 731 transitions. Word has length 72 [2021-08-12 19:31:21,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:21,101 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 731 transitions. [2021-08-12 19:31:21,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:21,101 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 731 transitions. [2021-08-12 19:31:21,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-12 19:31:21,102 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:21,102 INFO L550 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:21,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:21,317 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:21,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:21,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1768231027, now seen corresponding path program 42 times [2021-08-12 19:31:21,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:21,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417782726] [2021-08-12 19:31:21,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:21,551 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:21,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:21,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417782726] [2021-08-12 19:31:21,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417782726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:21,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792365562] [2021-08-12 19:31:21,551 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 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 [2021-08-12 19:31:21,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-08-12 19:31:21,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:21,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:31:21,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:22,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792365562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:22,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:22,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2021-08-12 19:31:22,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103450276] [2021-08-12 19:31:22,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-08-12 19:31:22,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:22,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-12 19:31:22,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2044, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 19:31:22,482 INFO L87 Difference]: Start difference. First operand 356 states and 731 transitions. Second operand has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:35,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:35,272 INFO L93 Difference]: Finished difference Result 3048 states and 6069 transitions. [2021-08-12 19:31:35,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-08-12 19:31:35,272 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-12 19:31:35,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:35,276 INFO L225 Difference]: With dead ends: 3048 [2021-08-12 19:31:35,277 INFO L226 Difference]: Without dead ends: 3031 [2021-08-12 19:31:35,280 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51852 ImplicationChecksByTransitivity, 8722.0ms TimeCoverageRelationStatistics Valid=26618, Invalid=86614, Unknown=0, NotChecked=0, Total=113232 [2021-08-12 19:31:35,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2021-08-12 19:31:35,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 300. [2021-08-12 19:31:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.0735785953177257) internal successors, (620), 299 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 620 transitions. [2021-08-12 19:31:35,412 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 620 transitions. Word has length 72 [2021-08-12 19:31:35,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:35,413 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 620 transitions. [2021-08-12 19:31:35,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:35,413 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 620 transitions. [2021-08-12 19:31:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-08-12 19:31:35,413 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:35,413 INFO L550 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:35,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:35,629 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:35,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:35,629 INFO L82 PathProgramCache]: Analyzing trace with hash -372460187, now seen corresponding path program 43 times [2021-08-12 19:31:35,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:35,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636849902] [2021-08-12 19:31:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:35,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:35,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636849902] [2021-08-12 19:31:35,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636849902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:35,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892285805] [2021-08-12 19:31:35,838 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 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 [2021-08-12 19:31:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:35,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 63 conjunts are in the unsatisfiable core [2021-08-12 19:31:35,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:35,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892285805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:35,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:35,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-12 19:31:35,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835790105] [2021-08-12 19:31:35,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:31:35,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:35,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:31:35,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:31:35,979 INFO L87 Difference]: Start difference. First operand 300 states and 620 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:37,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:37,132 INFO L93 Difference]: Finished difference Result 952 states and 1879 transitions. [2021-08-12 19:31:37,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:31:37,132 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-08-12 19:31:37,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:37,135 INFO L225 Difference]: With dead ends: 952 [2021-08-12 19:31:37,135 INFO L226 Difference]: Without dead ends: 824 [2021-08-12 19:31:37,135 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:31:37,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-08-12 19:31:37,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 625. [2021-08-12 19:31:37,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.1538461538461537) internal successors, (1344), 624 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:37,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1344 transitions. [2021-08-12 19:31:37,334 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1344 transitions. Word has length 74 [2021-08-12 19:31:37,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:37,335 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 1344 transitions. [2021-08-12 19:31:37,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:37,335 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1344 transitions. [2021-08-12 19:31:37,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-12 19:31:37,335 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:37,335 INFO L550 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:37,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-12 19:31:37,536 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:37,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:37,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1948763293, now seen corresponding path program 44 times [2021-08-12 19:31:37,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:37,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84113816] [2021-08-12 19:31:37,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:38,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:38,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84113816] [2021-08-12 19:31:38,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84113816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:38,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157294628] [2021-08-12 19:31:38,134 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:38,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:31:38,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:38,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-12 19:31:38,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:39,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157294628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:39,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:39,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 69 [2021-08-12 19:31:39,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734024273] [2021-08-12 19:31:39,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-08-12 19:31:39,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:39,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-08-12 19:31:39,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3995, Unknown=0, NotChecked=0, Total=4830 [2021-08-12 19:31:39,272 INFO L87 Difference]: Start difference. First operand 625 states and 1344 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:58,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:58,143 INFO L93 Difference]: Finished difference Result 5124 states and 10478 transitions. [2021-08-12 19:31:58,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2021-08-12 19:31:58,144 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-12 19:31:58,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:58,149 INFO L225 Difference]: With dead ends: 5124 [2021-08-12 19:31:58,150 INFO L226 Difference]: Without dead ends: 4143 [2021-08-12 19:31:58,156 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66817 ImplicationChecksByTransitivity, 11800.4ms TimeCoverageRelationStatistics Valid=41625, Invalid=110085, Unknown=0, NotChecked=0, Total=151710 [2021-08-12 19:31:58,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2021-08-12 19:31:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 378. [2021-08-12 19:31:58,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.061007957559682) internal successors, (777), 377 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 777 transitions. [2021-08-12 19:31:58,331 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 777 transitions. Word has length 76 [2021-08-12 19:31:58,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:58,332 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 777 transitions. [2021-08-12 19:31:58,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:58,332 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 777 transitions. [2021-08-12 19:31:58,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-12 19:31:58,332 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:58,333 INFO L550 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:58,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-12 19:31:58,537 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:58,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:58,537 INFO L82 PathProgramCache]: Analyzing trace with hash 122702221, now seen corresponding path program 45 times [2021-08-12 19:31:58,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:58,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778535539] [2021-08-12 19:31:58,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:58,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:58,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778535539] [2021-08-12 19:31:58,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778535539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:58,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221859801] [2021-08-12 19:31:58,795 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:58,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-08-12 19:31:58,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:58,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-12 19:31:58,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:59,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221859801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:59,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:59,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35] total 53 [2021-08-12 19:31:59,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135223149] [2021-08-12 19:31:59,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-08-12 19:31:59,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:59,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-12 19:31:59,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=2299, Unknown=0, NotChecked=0, Total=2862 [2021-08-12 19:31:59,763 INFO L87 Difference]: Start difference. First operand 378 states and 777 transitions. Second operand has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:14,979 INFO L93 Difference]: Finished difference Result 3424 states and 6821 transitions. [2021-08-12 19:32:14,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2021-08-12 19:32:14,979 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-12 19:32:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:14,984 INFO L225 Difference]: With dead ends: 3424 [2021-08-12 19:32:14,984 INFO L226 Difference]: Without dead ends: 3407 [2021-08-12 19:32:14,989 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65510 ImplicationChecksByTransitivity, 10068.1ms TimeCoverageRelationStatistics Valid=32999, Invalid=107251, Unknown=0, NotChecked=0, Total=140250 [2021-08-12 19:32:14,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2021-08-12 19:32:15,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 318. [2021-08-12 19:32:15,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.0757097791798107) internal successors, (658), 317 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:15,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 658 transitions. [2021-08-12 19:32:15,154 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 658 transitions. Word has length 76 [2021-08-12 19:32:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:15,154 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 658 transitions. [2021-08-12 19:32:15,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:15,154 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 658 transitions. [2021-08-12 19:32:15,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-08-12 19:32:15,155 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:15,155 INFO L550 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:15,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-12 19:32:15,355 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:15,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:15,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1078500063, now seen corresponding path program 46 times [2021-08-12 19:32:15,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:15,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523786187] [2021-08-12 19:32:15,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:15,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:15,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523786187] [2021-08-12 19:32:15,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523786187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:15,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276608601] [2021-08-12 19:32:15,565 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 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 [2021-08-12 19:32:15,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:32:15,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:15,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 67 conjunts are in the unsatisfiable core [2021-08-12 19:32:15,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:15,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276608601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:15,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:15,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-08-12 19:32:15,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523767156] [2021-08-12 19:32:15,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:32:15,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:15,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:32:15,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:32:15,708 INFO L87 Difference]: Start difference. First operand 318 states and 658 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:16,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:16,963 INFO L93 Difference]: Finished difference Result 1011 states and 1996 transitions. [2021-08-12 19:32:16,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:32:16,963 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-08-12 19:32:16,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:16,966 INFO L225 Difference]: With dead ends: 1011 [2021-08-12 19:32:16,966 INFO L226 Difference]: Without dead ends: 877 [2021-08-12 19:32:16,966 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:32:16,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-08-12 19:32:17,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 665. [2021-08-12 19:32:17,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.1551204819277108) internal successors, (1431), 664 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:17,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1431 transitions. [2021-08-12 19:32:17,192 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1431 transitions. Word has length 78 [2021-08-12 19:32:17,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:17,192 INFO L482 AbstractCegarLoop]: Abstraction has 665 states and 1431 transitions. [2021-08-12 19:32:17,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:17,192 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1431 transitions. [2021-08-12 19:32:17,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 19:32:17,193 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:17,193 INFO L550 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:17,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:17,396 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:17,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:17,397 INFO L82 PathProgramCache]: Analyzing trace with hash -999048161, now seen corresponding path program 47 times [2021-08-12 19:32:17,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:17,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124871044] [2021-08-12 19:32:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:17,939 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:17,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:17,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124871044] [2021-08-12 19:32:17,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124871044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:17,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299463742] [2021-08-12 19:32:17,940 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 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 [2021-08-12 19:32:17,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-08-12 19:32:17,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:17,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:32:17,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:19,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299463742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:19,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:19,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 73 [2021-08-12 19:32:19,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824032032] [2021-08-12 19:32:19,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-08-12 19:32:19,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:19,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-08-12 19:32:19,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=4473, Unknown=0, NotChecked=0, Total=5402 [2021-08-12 19:32:19,077 INFO L87 Difference]: Start difference. First operand 665 states and 1431 transitions. Second operand has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:41,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:41,705 INFO L93 Difference]: Finished difference Result 5685 states and 11616 transitions. [2021-08-12 19:32:41,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 361 states. [2021-08-12 19:32:41,705 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 19:32:41,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:41,712 INFO L225 Difference]: With dead ends: 5685 [2021-08-12 19:32:41,713 INFO L226 Difference]: Without dead ends: 4590 [2021-08-12 19:32:41,719 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83508 ImplicationChecksByTransitivity, 13597.3ms TimeCoverageRelationStatistics Valid=51145, Invalid=134185, Unknown=0, NotChecked=0, Total=185330 [2021-08-12 19:32:41,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4590 states. [2021-08-12 19:32:41,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4590 to 400. [2021-08-12 19:32:41,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.06265664160401) internal successors, (823), 399 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:41,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 823 transitions. [2021-08-12 19:32:41,912 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 823 transitions. Word has length 80 [2021-08-12 19:32:41,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:41,912 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 823 transitions. [2021-08-12 19:32:41,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:41,912 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 823 transitions. [2021-08-12 19:32:41,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 19:32:41,913 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:41,913 INFO L550 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:42,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-12 19:32:42,113 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:42,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:42,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2100824947, now seen corresponding path program 48 times [2021-08-12 19:32:42,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:42,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263376386] [2021-08-12 19:32:42,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:42,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:42,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263376386] [2021-08-12 19:32:42,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263376386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:42,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716151666] [2021-08-12 19:32:42,390 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 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 [2021-08-12 19:32:42,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-08-12 19:32:42,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:42,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:32:42,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:43,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716151666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:43,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:43,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37] total 56 [2021-08-12 19:32:43,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553340711] [2021-08-12 19:32:43,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-08-12 19:32:43,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:43,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-08-12 19:32:43,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=2569, Unknown=0, NotChecked=0, Total=3192 [2021-08-12 19:32:43,473 INFO L87 Difference]: Start difference. First operand 400 states and 823 transitions. Second operand has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:01,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:01,917 INFO L93 Difference]: Finished difference Result 3822 states and 7617 transitions. [2021-08-12 19:33:01,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 362 states. [2021-08-12 19:33:01,917 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 19:33:01,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:01,924 INFO L225 Difference]: With dead ends: 3822 [2021-08-12 19:33:01,924 INFO L226 Difference]: Without dead ends: 3805 [2021-08-12 19:33:01,930 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81707 ImplicationChecksByTransitivity, 11967.7ms TimeCoverageRelationStatistics Valid=40466, Invalid=131344, Unknown=0, NotChecked=0, Total=171810 [2021-08-12 19:33:01,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-08-12 19:33:02,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 336. [2021-08-12 19:33:02,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.0776119402985076) internal successors, (696), 335 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:02,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 696 transitions. [2021-08-12 19:33:02,116 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 696 transitions. Word has length 80 [2021-08-12 19:33:02,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:02,116 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 696 transitions. [2021-08-12 19:33:02,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:02,117 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 696 transitions. [2021-08-12 19:33:02,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-12 19:33:02,117 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:02,117 INFO L550 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:02,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:02,318 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:02,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:02,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1064675037, now seen corresponding path program 49 times [2021-08-12 19:33:02,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:02,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141606694] [2021-08-12 19:33:02,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:02,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:02,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141606694] [2021-08-12 19:33:02,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141606694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:02,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509958180] [2021-08-12 19:33:02,643 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:02,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 71 conjunts are in the unsatisfiable core [2021-08-12 19:33:02,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:02,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509958180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:02,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:02,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-08-12 19:33:02,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519627624] [2021-08-12 19:33:02,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:33:02,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:02,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:33:02,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:33:02,797 INFO L87 Difference]: Start difference. First operand 336 states and 696 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:04,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:04,309 INFO L93 Difference]: Finished difference Result 1070 states and 2113 transitions. [2021-08-12 19:33:04,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:33:04,310 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-08-12 19:33:04,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:04,313 INFO L225 Difference]: With dead ends: 1070 [2021-08-12 19:33:04,313 INFO L226 Difference]: Without dead ends: 930 [2021-08-12 19:33:04,313 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:33:04,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-08-12 19:33:04,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 705. [2021-08-12 19:33:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 2.15625) internal successors, (1518), 704 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:04,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1518 transitions. [2021-08-12 19:33:04,574 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1518 transitions. Word has length 82 [2021-08-12 19:33:04,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:04,574 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 1518 transitions. [2021-08-12 19:33:04,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:04,574 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1518 transitions. [2021-08-12 19:33:04,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-08-12 19:33:04,575 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:04,575 INFO L550 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:04,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:04,789 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:04,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:04,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1343377115, now seen corresponding path program 50 times [2021-08-12 19:33:04,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:04,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990977851] [2021-08-12 19:33:04,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:05,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:05,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990977851] [2021-08-12 19:33:05,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990977851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:05,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808399353] [2021-08-12 19:33:05,516 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 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 [2021-08-12 19:33:05,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:33:05,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:05,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:33:05,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:06,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808399353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:06,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:06,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 77 [2021-08-12 19:33:06,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231754952] [2021-08-12 19:33:06,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-08-12 19:33:06,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:06,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-08-12 19:33:06,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1028, Invalid=4978, Unknown=0, NotChecked=0, Total=6006 [2021-08-12 19:33:06,826 INFO L87 Difference]: Start difference. First operand 705 states and 1518 transitions. Second operand has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:33,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:33,403 INFO L93 Difference]: Finished difference Result 6274 states and 12810 transitions. [2021-08-12 19:33:33,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2021-08-12 19:33:33,404 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-08-12 19:33:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:33,411 INFO L225 Difference]: With dead ends: 6274 [2021-08-12 19:33:33,411 INFO L226 Difference]: Without dead ends: 5059 [2021-08-12 19:33:33,419 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103165 ImplicationChecksByTransitivity, 15874.2ms TimeCoverageRelationStatistics Valid=62217, Invalid=161985, Unknown=0, NotChecked=0, Total=224202 [2021-08-12 19:33:33,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5059 states. [2021-08-12 19:33:33,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5059 to 422. [2021-08-12 19:33:33,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.0641330166270784) internal successors, (869), 421 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:33,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 869 transitions. [2021-08-12 19:33:33,645 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 869 transitions. Word has length 84 [2021-08-12 19:33:33,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:33,645 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 869 transitions. [2021-08-12 19:33:33,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:33,645 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 869 transitions. [2021-08-12 19:33:33,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-08-12 19:33:33,646 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:33,646 INFO L550 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:33,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-12 19:33:33,846 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:33,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:33,846 INFO L82 PathProgramCache]: Analyzing trace with hash 182530189, now seen corresponding path program 51 times [2021-08-12 19:33:33,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:33,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999992558] [2021-08-12 19:33:33,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:34,145 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:34,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:34,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999992558] [2021-08-12 19:33:34,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999992558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:34,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554830556] [2021-08-12 19:33:34,145 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 [2021-08-12 19:33:34,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-08-12 19:33:34,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:34,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:33:34,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:35,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554830556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:35,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:35,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2021-08-12 19:33:35,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476755287] [2021-08-12 19:33:35,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-08-12 19:33:35,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:35,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-08-12 19:33:35,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=2854, Unknown=0, NotChecked=0, Total=3540 [2021-08-12 19:33:35,290 INFO L87 Difference]: Start difference. First operand 422 states and 869 transitions. Second operand has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:56,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:56,730 INFO L93 Difference]: Finished difference Result 4242 states and 8457 transitions. [2021-08-12 19:33:56,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 401 states. [2021-08-12 19:33:56,731 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-08-12 19:33:56,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:56,737 INFO L225 Difference]: With dead ends: 4242 [2021-08-12 19:33:56,737 INFO L226 Difference]: Without dead ends: 4225 [2021-08-12 19:33:56,745 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100740 ImplicationChecksByTransitivity, 13630.3ms TimeCoverageRelationStatistics Valid=49136, Invalid=159256, Unknown=0, NotChecked=0, Total=208392 [2021-08-12 19:33:56,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2021-08-12 19:33:56,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 354. [2021-08-12 19:33:56,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.0793201133144477) internal successors, (734), 353 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:56,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 734 transitions. [2021-08-12 19:33:56,968 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 734 transitions. Word has length 84 [2021-08-12 19:33:56,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:56,968 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 734 transitions. [2021-08-12 19:33:56,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:56,969 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 734 transitions. [2021-08-12 19:33:56,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-12 19:33:56,969 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:56,969 INFO L550 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:57,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:57,170 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:57,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:57,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1572502169, now seen corresponding path program 52 times [2021-08-12 19:33:57,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:57,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231911879] [2021-08-12 19:33:57,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:57,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:57,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231911879] [2021-08-12 19:33:57,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231911879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:57,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901668435] [2021-08-12 19:33:57,428 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 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 [2021-08-12 19:33:57,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:33:57,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:57,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 75 conjunts are in the unsatisfiable core [2021-08-12 19:33:57,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:57,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901668435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:57,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:57,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-08-12 19:33:57,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103367004] [2021-08-12 19:33:57,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:33:57,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:57,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:33:57,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:33:57,605 INFO L87 Difference]: Start difference. First operand 354 states and 734 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:59,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:59,319 INFO L93 Difference]: Finished difference Result 1129 states and 2230 transitions. [2021-08-12 19:33:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:33:59,320 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-08-12 19:33:59,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:59,323 INFO L225 Difference]: With dead ends: 1129 [2021-08-12 19:33:59,323 INFO L226 Difference]: Without dead ends: 983 [2021-08-12 19:33:59,324 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:33:59,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-08-12 19:33:59,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 745. [2021-08-12 19:33:59,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.157258064516129) internal successors, (1605), 744 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:59,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1605 transitions. [2021-08-12 19:33:59,633 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1605 transitions. Word has length 86 [2021-08-12 19:33:59,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:59,633 INFO L482 AbstractCegarLoop]: Abstraction has 745 states and 1605 transitions. [2021-08-12 19:33:59,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:59,634 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1605 transitions. [2021-08-12 19:33:59,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-12 19:33:59,634 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:59,634 INFO L550 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:59,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-12 19:33:59,835 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:59,835 INFO L82 PathProgramCache]: Analyzing trace with hash -5835881, now seen corresponding path program 53 times [2021-08-12 19:33:59,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:59,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491832162] [2021-08-12 19:33:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:00,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:00,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491832162] [2021-08-12 19:34:00,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491832162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:00,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875016173] [2021-08-12 19:34:00,484 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 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 [2021-08-12 19:34:00,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-08-12 19:34:00,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:00,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:34:00,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:01,840 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:01,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875016173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:01,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:01,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 81 [2021-08-12 19:34:01,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060105370] [2021-08-12 19:34:01,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-08-12 19:34:01,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:01,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-08-12 19:34:01,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=5510, Unknown=0, NotChecked=0, Total=6642 [2021-08-12 19:34:01,842 INFO L87 Difference]: Start difference. First operand 745 states and 1605 transitions. Second operand has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:33,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:33,524 INFO L93 Difference]: Finished difference Result 6891 states and 14060 transitions. [2021-08-12 19:34:33,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 441 states. [2021-08-12 19:34:33,525 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-08-12 19:34:33,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:33,533 INFO L225 Difference]: With dead ends: 6891 [2021-08-12 19:34:33,533 INFO L226 Difference]: Without dead ends: 5550 [2021-08-12 19:34:33,542 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126123 ImplicationChecksByTransitivity, 18149.6ms TimeCoverageRelationStatistics Valid=75002, Invalid=193840, Unknown=0, NotChecked=0, Total=268842 [2021-08-12 19:34:33,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2021-08-12 19:34:33,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 444. [2021-08-12 19:34:33,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0654627539503387) internal successors, (915), 443 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:33,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 915 transitions. [2021-08-12 19:34:33,819 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 915 transitions. Word has length 88 [2021-08-12 19:34:33,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:33,819 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 915 transitions. [2021-08-12 19:34:33,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:33,819 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 915 transitions. [2021-08-12 19:34:33,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-12 19:34:33,820 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:33,820 INFO L550 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:34,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-12 19:34:34,020 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:34,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:34,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2098512499, now seen corresponding path program 54 times [2021-08-12 19:34:34,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:34,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843712186] [2021-08-12 19:34:34,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:34,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:34,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843712186] [2021-08-12 19:34:34,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843712186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:34,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662339477] [2021-08-12 19:34:34,312 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 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 [2021-08-12 19:34:34,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-08-12 19:34:34,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:34,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:34:34,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:35,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662339477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:35,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:35,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2021-08-12 19:34:35,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561202394] [2021-08-12 19:34:35,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-08-12 19:34:35,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:35,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-12 19:34:35,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=3154, Unknown=0, NotChecked=0, Total=3906 [2021-08-12 19:34:35,588 INFO L87 Difference]: Start difference. First operand 444 states and 915 transitions. Second operand has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:01,296 INFO L93 Difference]: Finished difference Result 4684 states and 9341 transitions. [2021-08-12 19:35:01,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 442 states. [2021-08-12 19:35:01,297 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-08-12 19:35:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:01,305 INFO L225 Difference]: With dead ends: 4684 [2021-08-12 19:35:01,305 INFO L226 Difference]: Without dead ends: 4667 [2021-08-12 19:35:01,317 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122923 ImplicationChecksByTransitivity, 15773.0ms TimeCoverageRelationStatistics Valid=59132, Invalid=191368, Unknown=0, NotChecked=0, Total=250500 [2021-08-12 19:35:01,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2021-08-12 19:35:01,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 372. [2021-08-12 19:35:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.0808625336927222) internal successors, (772), 371 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 772 transitions. [2021-08-12 19:35:01,669 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 772 transitions. Word has length 88 [2021-08-12 19:35:01,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:01,669 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 772 transitions. [2021-08-12 19:35:01,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:01,669 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 772 transitions. [2021-08-12 19:35:01,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 19:35:01,670 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:01,670 INFO L550 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:01,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:35:01,894 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:01,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:01,894 INFO L82 PathProgramCache]: Analyzing trace with hash 2058936405, now seen corresponding path program 55 times [2021-08-12 19:35:01,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:01,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089139613] [2021-08-12 19:35:01,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:02,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:02,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089139613] [2021-08-12 19:35:02,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089139613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:02,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032957216] [2021-08-12 19:35:02,173 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 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 [2021-08-12 19:35:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:02,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 79 conjunts are in the unsatisfiable core [2021-08-12 19:35:02,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:02,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032957216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:02,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:02,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-08-12 19:35:02,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909853357] [2021-08-12 19:35:02,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:35:02,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:02,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:35:02,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:35:02,343 INFO L87 Difference]: Start difference. First operand 372 states and 772 transitions. Second operand has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:04,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:04,461 INFO L93 Difference]: Finished difference Result 1188 states and 2347 transitions. [2021-08-12 19:35:04,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:35:04,462 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 19:35:04,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:04,465 INFO L225 Difference]: With dead ends: 1188 [2021-08-12 19:35:04,466 INFO L226 Difference]: Without dead ends: 1036 [2021-08-12 19:35:04,466 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:35:04,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-08-12 19:35:04,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 785. [2021-08-12 19:35:04,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.1581632653061225) internal successors, (1692), 784 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:04,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1692 transitions. [2021-08-12 19:35:04,870 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1692 transitions. Word has length 90 [2021-08-12 19:35:04,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:04,871 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 1692 transitions. [2021-08-12 19:35:04,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:04,871 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1692 transitions. [2021-08-12 19:35:04,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-08-12 19:35:04,871 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:04,871 INFO L550 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:05,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-12 19:35:05,072 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:05,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:05,072 INFO L82 PathProgramCache]: Analyzing trace with hash -274421165, now seen corresponding path program 56 times [2021-08-12 19:35:05,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:05,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694286779] [2021-08-12 19:35:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:05,799 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:05,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:05,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694286779] [2021-08-12 19:35:05,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694286779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:05,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498358269] [2021-08-12 19:35:05,800 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 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 [2021-08-12 19:35:05,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:35:05,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:35:05,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-12 19:35:05,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:07,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498358269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:07,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:07,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 85 [2021-08-12 19:35:07,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981003203] [2021-08-12 19:35:07,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-08-12 19:35:07,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:07,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-08-12 19:35:07,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1241, Invalid=6069, Unknown=0, NotChecked=0, Total=7310 [2021-08-12 19:35:07,318 INFO L87 Difference]: Start difference. First operand 785 states and 1692 transitions. Second operand has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:45,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:45,177 INFO L93 Difference]: Finished difference Result 7536 states and 15366 transitions. [2021-08-12 19:35:45,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 484 states. [2021-08-12 19:35:45,178 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-08-12 19:35:45,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:45,186 INFO L225 Difference]: With dead ends: 7536 [2021-08-12 19:35:45,186 INFO L226 Difference]: Without dead ends: 6063 [2021-08-12 19:35:45,196 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152734 ImplicationChecksByTransitivity, 21232.6ms TimeCoverageRelationStatistics Valid=89669, Invalid=230121, Unknown=0, NotChecked=0, Total=319790 [2021-08-12 19:35:45,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-08-12 19:35:45,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 466. [2021-08-12 19:35:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.066666666666667) internal successors, (961), 465 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:45,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 961 transitions. [2021-08-12 19:35:45,551 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 961 transitions. Word has length 92 [2021-08-12 19:35:45,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:45,551 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 961 transitions. [2021-08-12 19:35:45,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:45,551 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 961 transitions. [2021-08-12 19:35:45,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-08-12 19:35:45,552 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:45,552 INFO L550 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:45,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:35:45,753 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:45,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:45,753 INFO L82 PathProgramCache]: Analyzing trace with hash -207266931, now seen corresponding path program 57 times [2021-08-12 19:35:45,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:45,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660589102] [2021-08-12 19:35:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:46,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:46,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660589102] [2021-08-12 19:35:46,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660589102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:46,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151591798] [2021-08-12 19:35:46,057 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 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 [2021-08-12 19:35:46,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-08-12 19:35:46,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:35:46,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-12 19:35:46,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:47,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151591798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:47,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:47,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43] total 65 [2021-08-12 19:35:47,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690754842] [2021-08-12 19:35:47,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-08-12 19:35:47,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:47,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-12 19:35:47,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=3469, Unknown=0, NotChecked=0, Total=4290 [2021-08-12 19:35:47,393 INFO L87 Difference]: Start difference. First operand 466 states and 961 transitions. Second operand has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:17,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:36:17,154 INFO L93 Difference]: Finished difference Result 5148 states and 10269 transitions. [2021-08-12 19:36:17,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 485 states. [2021-08-12 19:36:17,154 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-08-12 19:36:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:36:17,161 INFO L225 Difference]: With dead ends: 5148 [2021-08-12 19:36:17,161 INFO L226 Difference]: Without dead ends: 5131 [2021-08-12 19:36:17,171 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 545 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148586 ImplicationChecksByTransitivity, 17957.5ms TimeCoverageRelationStatistics Valid=70583, Invalid=228079, Unknown=0, NotChecked=0, Total=298662 [2021-08-12 19:36:17,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2021-08-12 19:36:17,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 390. [2021-08-12 19:36:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.082262210796915) internal successors, (810), 389 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:17,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 810 transitions. [2021-08-12 19:36:17,491 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 810 transitions. Word has length 92 [2021-08-12 19:36:17,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:36:17,492 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 810 transitions. [2021-08-12 19:36:17,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:17,492 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 810 transitions. [2021-08-12 19:36:17,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-12 19:36:17,492 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:36:17,492 INFO L550 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:36:17,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-12 19:36:17,694 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:36:17,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:36:17,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1646516241, now seen corresponding path program 58 times [2021-08-12 19:36:17,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:36:17,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267152722] [2021-08-12 19:36:17,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:36:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:36:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:17,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:36:17,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267152722] [2021-08-12 19:36:17,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267152722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:17,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932273901] [2021-08-12 19:36:17,969 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 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 [2021-08-12 19:36:18,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:36:18,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:36:18,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 83 conjunts are in the unsatisfiable core [2021-08-12 19:36:18,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:36:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:18,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932273901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:18,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:36:18,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-08-12 19:36:18,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813501029] [2021-08-12 19:36:18,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:36:18,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:36:18,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:36:18,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:36:18,137 INFO L87 Difference]: Start difference. First operand 390 states and 810 transitions. Second operand has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:20,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:36:20,452 INFO L93 Difference]: Finished difference Result 1247 states and 2464 transitions. [2021-08-12 19:36:20,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:36:20,452 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-08-12 19:36:20,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:36:20,456 INFO L225 Difference]: With dead ends: 1247 [2021-08-12 19:36:20,456 INFO L226 Difference]: Without dead ends: 1089 [2021-08-12 19:36:20,456 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:36:20,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-08-12 19:36:20,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 825. [2021-08-12 19:36:20,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.158980582524272) internal successors, (1779), 824 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1779 transitions. [2021-08-12 19:36:20,944 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1779 transitions. Word has length 94 [2021-08-12 19:36:20,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:36:20,944 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 1779 transitions. [2021-08-12 19:36:20,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:20,945 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1779 transitions. [2021-08-12 19:36:20,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-12 19:36:20,945 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:36:20,945 INFO L550 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:36:21,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:36:21,146 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:36:21,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:36:21,146 INFO L82 PathProgramCache]: Analyzing trace with hash -2013367537, now seen corresponding path program 59 times [2021-08-12 19:36:21,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:36:21,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192860538] [2021-08-12 19:36:21,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:36:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:36:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:21,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:36:21,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192860538] [2021-08-12 19:36:21,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192860538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:21,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450077347] [2021-08-12 19:36:21,891 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 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 [2021-08-12 19:36:21,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-08-12 19:36:21,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:36:21,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-12 19:36:21,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:36:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:23,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450077347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:23,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:36:23,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 89 [2021-08-12 19:36:23,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447552605] [2021-08-12 19:36:23,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-08-12 19:36:23,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:36:23,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-08-12 19:36:23,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=6655, Unknown=0, NotChecked=0, Total=8010 [2021-08-12 19:36:23,477 INFO L87 Difference]: Start difference. First operand 825 states and 1779 transitions. Second operand has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-08-12 19:36:58,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 467 states. [2021-08-12 19:36:58,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-12 19:36:58,980 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 19:36:58,982 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 19:36:58,983 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 19:36:58,984 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 07:36:58 BasicIcfg [2021-08-12 19:36:58,984 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 19:36:58,984 INFO L168 Benchmark]: Toolchain (without parser) took 501210.24 ms. Allocated memory was 178.3 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 159.2 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 312.4 MB. Max. memory is 8.0 GB. [2021-08-12 19:36:58,984 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 178.3 MB. Free memory is still 160.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 19:36:58,984 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.72 ms. Allocated memory is still 178.3 MB. Free memory was 159.2 MB in the beginning and 157.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 19:36:58,984 INFO L168 Benchmark]: Boogie Preprocessor took 13.39 ms. Allocated memory is still 178.3 MB. Free memory was 157.7 MB in the beginning and 156.8 MB in the end (delta: 912.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 19:36:58,984 INFO L168 Benchmark]: RCFGBuilder took 313.50 ms. Allocated memory is still 178.3 MB. Free memory was 156.8 MB in the beginning and 145.2 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-08-12 19:36:58,985 INFO L168 Benchmark]: TraceAbstraction took 500856.27 ms. Allocated memory was 178.3 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 144.8 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 297.7 MB. Max. memory is 8.0 GB. [2021-08-12 19:36:58,985 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 0.14 ms. Allocated memory is still 178.3 MB. Free memory is still 160.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.72 ms. Allocated memory is still 178.3 MB. Free memory was 159.2 MB in the beginning and 157.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.39 ms. Allocated memory is still 178.3 MB. Free memory was 157.7 MB in the beginning and 156.8 MB in the end (delta: 912.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 313.50 ms. Allocated memory is still 178.3 MB. Free memory was 156.8 MB in the beginning and 145.2 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 500856.27 ms. Allocated memory was 178.3 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 144.8 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 297.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (825states) and FLOYD_HOARE automaton (currently 467 states, 90 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 553 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 31 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 500754.1ms, OverallIterations: 62, TraceHistogramMax: 21, EmptinessCheckTime: 49.1ms, AutomataDifference: 436260.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 31.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4585 SDtfs, 30980 SDslu, 73044 SDs, 0 SdLazy, 78419 SolverSat, 4173 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 35986.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12710 GetRequests, 2823 SyntacticMatches, 40 SemanticMatches, 9846 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602350 ImplicationChecksByTransitivity, 269888.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=825occurred in iteration=61, InterpolantAutomatonStates: 7869, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6712.0ms AutomataMinimizationTime, 61 MinimizatonAttempts, 81637 StatesRemovedByMinimization, 61 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 334.9ms SsaConstructionTime, 1484.3ms SatisfiabilityAnalysisTime, 41544.9ms InterpolantComputationTime, 6750 NumberOfCodeBlocks, 6750 NumberOfCodeBlocksAsserted, 498 NumberOfCheckSat, 6628 ConstructedInterpolants, 0 QuantifiedInterpolants, 47283 SizeOfPredicates, 180 NumberOfNonLiveVariables, 8590 ConjunctsInSsa, 1900 ConjunctsInUnsatCore, 122 InterpolantComputations, 2 PerfectInterpolantSequences, 11099/34521 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