/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 05:29:21,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 05:29:21,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 05:29:21,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 05:29:21,828 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 [2021-04-15 05:29:21,859 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 05:29:21,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 05:29:21,860 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 05:29:21,860 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 05:29:21,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 05:29:21,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 05:29:21,862 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 05:29:21,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 05:29:21,863 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 05:29:21,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 05:29:21,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 05:29:21,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 05:29:21,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 05:29:21,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 05:29:21,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 05:29:21,864 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 05:29:21,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 05:29:21,864 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 05:29:21,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 05:29:21,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 05:29:21,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 05:29:21,865 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 05:29:21,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 05:29:21,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 05:29:21,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 05:29:21,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 05:29:21,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 05:29:21,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 05:29:21,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 05:29:21,866 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 05:29:21,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 05:29:21,866 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 05:29:22,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 05:29:22,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 05:29:22,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 05:29:22,185 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 05:29:22,188 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 05:29:22,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun.wvr.bpl [2021-04-15 05:29:22,190 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun.wvr.bpl' [2021-04-15 05:29:22,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 05:29:22,239 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 05:29:22,241 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 05:29:22,241 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 05:29:22,241 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 05:29:22,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:29:22" (1/1) ... [2021-04-15 05:29:22,264 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:29:22" (1/1) ... [2021-04-15 05:29:22,271 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 05:29:22,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 05:29:22,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 05:29:22,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 05:29:22,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:29:22" (1/1) ... [2021-04-15 05:29:22,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:29:22" (1/1) ... [2021-04-15 05:29:22,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:29:22" (1/1) ... [2021-04-15 05:29:22,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:29:22" (1/1) ... [2021-04-15 05:29:22,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:29:22" (1/1) ... [2021-04-15 05:29:22,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:29:22" (1/1) ... [2021-04-15 05:29:22,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:29:22" (1/1) ... [2021-04-15 05:29:22,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 05:29:22,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 05:29:22,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 05:29:22,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 05:29:22,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:29:22" (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 [2021-04-15 05:29:22,371 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 05:29:22,372 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 05:29:22,372 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 05:29:22,372 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 05:29:22,372 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 05:29:22,372 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 05:29:22,373 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 05:29:22,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 05:29:22,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 05:29:22,373 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 05:29:22,373 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 05:29:22,373 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 05:29:22,374 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 05:29:22,596 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 05:29:22,597 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 05:29:22,598 INFO L202 PluginConnector]: Adding new model sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 05:29:22 BoogieIcfgContainer [2021-04-15 05:29:22,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 05:29:22,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 05:29:22,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 05:29:22,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 05:29:22,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:29:22" (1/2) ... [2021-04-15 05:29:22,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94bf056 and model type sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 05:29:22, skipping insertion in model container [2021-04-15 05:29:22,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 05:29:22" (2/2) ... [2021-04-15 05:29:22,604 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-fun.wvr.bpl [2021-04-15 05:29:22,608 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 05:29:22,609 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 05:29:22,611 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 05:29:22,612 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 05:29:22,665 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-04-15 05:29:22,680 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-04-15 05:29:22,704 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 05:29:22,704 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 05:29:22,704 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 05:29:22,704 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 05:29:22,704 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 05:29:22,704 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 05:29:22,704 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 05:29:22,704 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 05:29:22,712 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-04-15 05:29:22,729 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:22,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:22,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 05:29:22,738 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:22,738 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:22,739 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:22,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:22,743 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-04-15 05:29:22,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:22,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235448328] [2021-04-15 05:29:22,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:22,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:22,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235448328] [2021-04-15 05:29:22,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:29:22,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 05:29:22,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581846790] [2021-04-15 05:29:22,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:29:22,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:22,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:29:22,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:29:22,943 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:23,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:23,001 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2021-04-15 05:29:23,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 05:29:23,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 05:29:23,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:23,012 INFO L225 Difference]: With dead ends: 154 [2021-04-15 05:29:23,012 INFO L226 Difference]: Without dead ends: 154 [2021-04-15 05:29:23,013 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:29:23,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-04-15 05:29:23,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-04-15 05:29:23,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:23,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-04-15 05:29:23,076 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2021-04-15 05:29:23,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:23,077 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-04-15 05:29:23,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:23,077 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-04-15 05:29:23,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 05:29:23,079 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:23,079 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:23,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 05:29:23,079 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:23,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:23,080 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-04-15 05:29:23,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:23,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541223196] [2021-04-15 05:29:23,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:29:23,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541223196] [2021-04-15 05:29:23,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:29:23,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 05:29:23,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330726213] [2021-04-15 05:29:23,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 05:29:23,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:23,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 05:29:23,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 05:29:23,123 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:23,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:23,155 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2021-04-15 05:29:23,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 05:29:23,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 05:29:23,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:23,158 INFO L225 Difference]: With dead ends: 158 [2021-04-15 05:29:23,158 INFO L226 Difference]: Without dead ends: 158 [2021-04-15 05:29:23,158 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:29:23,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-04-15 05:29:23,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-04-15 05:29:23,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:23,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-04-15 05:29:23,178 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-04-15 05:29:23,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:23,178 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-04-15 05:29:23,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:23,179 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-04-15 05:29:23,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 05:29:23,180 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:23,181 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:23,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 05:29:23,181 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:23,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:23,182 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-04-15 05:29:23,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:23,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277430304] [2021-04-15 05:29:23,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:23,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277430304] [2021-04-15 05:29:23,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046701664] [2021-04-15 05:29:23,463 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 [2021-04-15 05:29:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:23,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 05:29:23,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:23,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:29:23,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 05:29:23,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:29:23,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:29:23,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:29:23,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-04-15 05:29:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:23,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:23,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:29:23,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315340403] [2021-04-15 05:29:23,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:29:23,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:23,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:29:23,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:29:23,920 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:24,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:24,160 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-04-15 05:29:24,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:29:24,161 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 05:29:24,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:24,163 INFO L225 Difference]: With dead ends: 330 [2021-04-15 05:29:24,163 INFO L226 Difference]: Without dead ends: 315 [2021-04-15 05:29:24,164 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 318.9ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:29:24,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-04-15 05:29:24,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-04-15 05:29:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:24,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-04-15 05:29:24,188 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-04-15 05:29:24,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:24,189 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-04-15 05:29:24,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:24,189 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-04-15 05:29:24,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 05:29:24,191 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:24,191 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:24,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-04-15 05:29:24,405 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:24,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:24,406 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-04-15 05:29:24,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:24,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537987506] [2021-04-15 05:29:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:24,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537987506] [2021-04-15 05:29:24,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971685323] [2021-04-15 05:29:24,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:24,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:29:24,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:24,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 05:29:24,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:24,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:29:24,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 05:29:24,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:29:24,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:29:24,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:29:24,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-04-15 05:29:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:24,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:24,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-04-15 05:29:24,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691664311] [2021-04-15 05:29:24,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:29:24,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:24,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:29:24,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:29:24,961 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:25,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:25,399 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-04-15 05:29:25,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:29:25,400 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 05:29:25,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:25,403 INFO L225 Difference]: With dead ends: 374 [2021-04-15 05:29:25,403 INFO L226 Difference]: Without dead ends: 359 [2021-04-15 05:29:25,403 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 450.2ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:29:25,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-04-15 05:29:25,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-04-15 05:29:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:25,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-04-15 05:29:25,415 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-04-15 05:29:25,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:25,415 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-04-15 05:29:25,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:25,416 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-04-15 05:29:25,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 05:29:25,419 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:25,419 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:25,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:25,633 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:25,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:25,633 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-04-15 05:29:25,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:25,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683389322] [2021-04-15 05:29:25,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:25,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683389322] [2021-04-15 05:29:25,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575779421] [2021-04-15 05:29:25,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:25,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 05:29:25,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:25,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 05:29:25,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:26,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 05:29:26,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:29:26,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:29:26,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:29:26,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-04-15 05:29:26,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:26,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:26,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 05:29:26,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230989961] [2021-04-15 05:29:26,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:29:26,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:26,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:29:26,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:29:26,103 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:26,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:26,270 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-04-15 05:29:26,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 05:29:26,272 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 05:29:26,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:26,275 INFO L225 Difference]: With dead ends: 296 [2021-04-15 05:29:26,275 INFO L226 Difference]: Without dead ends: 281 [2021-04-15 05:29:26,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 258.9ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:29:26,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-04-15 05:29:26,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-04-15 05:29:26,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:26,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-04-15 05:29:26,288 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-04-15 05:29:26,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:26,288 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-04-15 05:29:26,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:26,290 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-04-15 05:29:26,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 05:29:26,293 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:26,293 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:26,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:26,518 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:26,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:26,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-04-15 05:29:26,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:26,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070954423] [2021-04-15 05:29:26,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:26,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:26,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070954423] [2021-04-15 05:29:26,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120399259] [2021-04-15 05:29:26,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:29:26,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:29:26,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:26,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 05:29:26,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:26,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:29:26,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 05:29:26,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:29:26,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:29:26,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:29:26,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:22 [2021-04-15 05:29:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:26,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:26,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:29:26,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339441254] [2021-04-15 05:29:26,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:29:26,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:26,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:29:26,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:29:26,933 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:27,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:27,148 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-04-15 05:29:27,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:29:27,148 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 05:29:27,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:27,151 INFO L225 Difference]: With dead ends: 425 [2021-04-15 05:29:27,151 INFO L226 Difference]: Without dead ends: 410 [2021-04-15 05:29:27,151 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 278.3ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:29:27,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-04-15 05:29:27,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-04-15 05:29:27,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-04-15 05:29:27,161 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-04-15 05:29:27,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:27,161 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-04-15 05:29:27,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:27,162 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-04-15 05:29:27,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:27,162 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:27,163 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:27,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:27,377 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:27,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:27,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-04-15 05:29:27,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:27,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117734829] [2021-04-15 05:29:27,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:27,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117734829] [2021-04-15 05:29:27,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680385823] [2021-04-15 05:29:27,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:27,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:29:27,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:27,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:27,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:27,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:27,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:29:27,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577998413] [2021-04-15 05:29:27,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:29:27,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:27,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:29:27,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:29:27,585 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:28,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:28,010 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-04-15 05:29:28,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:29:28,011 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:28,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:28,014 INFO L225 Difference]: With dead ends: 619 [2021-04-15 05:29:28,015 INFO L226 Difference]: Without dead ends: 619 [2021-04-15 05:29:28,015 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:29:28,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-04-15 05:29:28,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-04-15 05:29:28,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:28,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-04-15 05:29:28,027 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-04-15 05:29:28,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:28,029 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-04-15 05:29:28,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:28,029 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-04-15 05:29:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:28,030 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:28,030 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:28,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-04-15 05:29:28,245 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:28,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:28,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-04-15 05:29:28,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:28,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065736041] [2021-04-15 05:29:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:28,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065736041] [2021-04-15 05:29:28,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887184035] [2021-04-15 05:29:28,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:28,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:29:28,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:28,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:28,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:28,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:28,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:29:28,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990276614] [2021-04-15 05:29:28,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:29:28,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:28,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:29:28,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:29:28,465 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:29,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:29,297 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-04-15 05:29:29,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 05:29:29,298 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:29,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:29,303 INFO L225 Difference]: With dead ends: 1078 [2021-04-15 05:29:29,303 INFO L226 Difference]: Without dead ends: 1078 [2021-04-15 05:29:29,304 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 517.1ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:29:29,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-04-15 05:29:29,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-04-15 05:29:29,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:29,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-04-15 05:29:29,319 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-04-15 05:29:29,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:29,320 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-04-15 05:29:29,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:29,321 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-04-15 05:29:29,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:29,324 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:29,324 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:29,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:29,547 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:29,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:29,548 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-04-15 05:29:29,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:29,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155264508] [2021-04-15 05:29:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:29,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155264508] [2021-04-15 05:29:29,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484673218] [2021-04-15 05:29:29,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:29,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:29,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:29,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:29,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:29:29,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547124354] [2021-04-15 05:29:29,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:29:29,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:29,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:29:29,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:29:29,751 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:30,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:30,472 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-04-15 05:29:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 05:29:30,472 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:30,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:30,477 INFO L225 Difference]: With dead ends: 951 [2021-04-15 05:29:30,477 INFO L226 Difference]: Without dead ends: 951 [2021-04-15 05:29:30,478 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 461.0ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:29:30,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-04-15 05:29:30,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-04-15 05:29:30,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:30,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-04-15 05:29:30,493 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-04-15 05:29:30,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:30,493 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-04-15 05:29:30,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:30,493 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-04-15 05:29:30,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:30,494 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:30,494 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:30,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:30,709 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:30,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:30,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-04-15 05:29:30,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:30,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680597223] [2021-04-15 05:29:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:29:30,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680597223] [2021-04-15 05:29:30,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151736148] [2021-04-15 05:29:30,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:30,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 05:29:30,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:29:30,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:30,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-04-15 05:29:30,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519503043] [2021-04-15 05:29:30,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:29:30,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:30,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:29:30,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:29:30,831 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:30,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:30,947 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-04-15 05:29:30,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 05:29:30,948 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:30,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:30,951 INFO L225 Difference]: With dead ends: 669 [2021-04-15 05:29:30,951 INFO L226 Difference]: Without dead ends: 663 [2021-04-15 05:29:30,951 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:29:30,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-04-15 05:29:30,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-04-15 05:29:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-04-15 05:29:30,965 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-04-15 05:29:30,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:30,966 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-04-15 05:29:30,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:30,966 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-04-15 05:29:30,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:30,967 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:30,967 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:31,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-04-15 05:29:31,181 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:31,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:31,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-04-15 05:29:31,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:31,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118538966] [2021-04-15 05:29:31,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:31,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118538966] [2021-04-15 05:29:31,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833592241] [2021-04-15 05:29:31,226 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 [2021-04-15 05:29:31,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:29:31,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:31,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:31,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:31,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:31,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 05:29:31,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572412217] [2021-04-15 05:29:31,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:29:31,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:31,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:29:31,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:29:31,352 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:31,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:31,520 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-04-15 05:29:31,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:29:31,520 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:31,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:31,524 INFO L225 Difference]: With dead ends: 710 [2021-04-15 05:29:31,524 INFO L226 Difference]: Without dead ends: 672 [2021-04-15 05:29:31,525 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:29:31,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-04-15 05:29:31,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-04-15 05:29:31,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:31,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-04-15 05:29:31,541 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-04-15 05:29:31,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:31,541 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-04-15 05:29:31,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:31,541 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-04-15 05:29:31,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:31,542 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:31,542 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:31,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-04-15 05:29:31,764 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:31,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:31,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-04-15 05:29:31,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:31,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251010513] [2021-04-15 05:29:31,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:29:31,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251010513] [2021-04-15 05:29:31,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538561761] [2021-04-15 05:29:31,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:29:31,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:29:31,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:31,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 05:29:31,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:29:31,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:31,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-04-15 05:29:31,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505684797] [2021-04-15 05:29:31,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:29:31,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:31,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:29:31,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:29:31,901 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:32,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:32,015 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-04-15 05:29:32,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 05:29:32,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:32,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:32,019 INFO L225 Difference]: With dead ends: 830 [2021-04-15 05:29:32,019 INFO L226 Difference]: Without dead ends: 830 [2021-04-15 05:29:32,020 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:29:32,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-04-15 05:29:32,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-04-15 05:29:32,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:32,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-04-15 05:29:32,036 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-04-15 05:29:32,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:32,037 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-04-15 05:29:32,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:32,037 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-04-15 05:29:32,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:32,038 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:32,038 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:32,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-04-15 05:29:32,253 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:32,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:32,253 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-04-15 05:29:32,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:32,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153339474] [2021-04-15 05:29:32,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:32,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:32,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153339474] [2021-04-15 05:29:32,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89821786] [2021-04-15 05:29:32,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:32,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:29:32,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:32,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:32,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:32,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:32,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:29:32,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084580314] [2021-04-15 05:29:32,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:29:32,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:32,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:29:32,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:29:32,417 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:32,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:32,717 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-04-15 05:29:32,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:29:32,718 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:32,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:32,724 INFO L225 Difference]: With dead ends: 1196 [2021-04-15 05:29:32,724 INFO L226 Difference]: Without dead ends: 1196 [2021-04-15 05:29:32,724 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:29:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-04-15 05:29:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-04-15 05:29:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-04-15 05:29:32,743 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-04-15 05:29:32,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:32,744 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-04-15 05:29:32,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:32,744 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-04-15 05:29:32,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:32,745 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:32,745 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:32,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-04-15 05:29:32,958 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:32,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:32,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-04-15 05:29:32,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:32,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734838829] [2021-04-15 05:29:32,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:33,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734838829] [2021-04-15 05:29:33,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393463399] [2021-04-15 05:29:33,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:33,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:29:33,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:33,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:33,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:33,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:33,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:29:33,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015344842] [2021-04-15 05:29:33,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:29:33,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:33,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:29:33,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:29:33,132 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:33,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:33,579 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-04-15 05:29:33,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 05:29:33,579 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:33,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:33,585 INFO L225 Difference]: With dead ends: 1492 [2021-04-15 05:29:33,585 INFO L226 Difference]: Without dead ends: 1492 [2021-04-15 05:29:33,586 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 280.2ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 05:29:33,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-04-15 05:29:33,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-04-15 05:29:33,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:33,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-04-15 05:29:33,607 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-04-15 05:29:33,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:33,608 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-04-15 05:29:33,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:33,608 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-04-15 05:29:33,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:33,609 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:33,609 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:33,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-04-15 05:29:33,825 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:33,825 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-04-15 05:29:33,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:33,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976537092] [2021-04-15 05:29:33,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:33,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976537092] [2021-04-15 05:29:33,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614490124] [2021-04-15 05:29:33,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:33,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:29:33,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:33,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:33,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:33,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:33,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 05:29:33,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012360301] [2021-04-15 05:29:33,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:29:33,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:33,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:29:33,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:29:33,975 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:34,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:34,237 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-04-15 05:29:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:29:34,237 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:34,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:34,242 INFO L225 Difference]: With dead ends: 1258 [2021-04-15 05:29:34,242 INFO L226 Difference]: Without dead ends: 1248 [2021-04-15 05:29:34,243 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:29:34,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-04-15 05:29:34,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-04-15 05:29:34,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-04-15 05:29:34,265 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-04-15 05:29:34,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:34,265 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-04-15 05:29:34,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:34,265 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-04-15 05:29:34,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:34,267 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:34,267 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:34,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:34,481 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:34,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:34,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-04-15 05:29:34,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:34,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082325595] [2021-04-15 05:29:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:34,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082325595] [2021-04-15 05:29:34,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69880138] [2021-04-15 05:29:34,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:34,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:29:34,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:34,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:34,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:34,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:34,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 05:29:34,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899620959] [2021-04-15 05:29:34,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:29:34,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:34,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:29:34,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:29:34,625 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:34,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:34,893 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-04-15 05:29:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:29:34,893 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:34,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:34,898 INFO L225 Difference]: With dead ends: 1329 [2021-04-15 05:29:34,898 INFO L226 Difference]: Without dead ends: 1329 [2021-04-15 05:29:34,898 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:29:34,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-04-15 05:29:34,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-04-15 05:29:34,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:34,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-04-15 05:29:34,918 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-04-15 05:29:34,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:34,918 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-04-15 05:29:34,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:34,918 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-04-15 05:29:34,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:34,920 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:34,920 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:35,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:35,142 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:35,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:35,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-04-15 05:29:35,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:35,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969276396] [2021-04-15 05:29:35,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:35,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969276396] [2021-04-15 05:29:35,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922268544] [2021-04-15 05:29:35,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:35,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:35,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:35,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:35,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:35,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:29:35,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141417444] [2021-04-15 05:29:35,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:29:35,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:35,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:29:35,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:29:35,385 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:35,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:35,710 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-04-15 05:29:35,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 05:29:35,710 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:35,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:35,716 INFO L225 Difference]: With dead ends: 1548 [2021-04-15 05:29:35,716 INFO L226 Difference]: Without dead ends: 1544 [2021-04-15 05:29:35,716 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 262.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:29:35,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-04-15 05:29:35,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-04-15 05:29:35,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:35,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-04-15 05:29:35,739 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-04-15 05:29:35,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:35,739 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-04-15 05:29:35,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:35,739 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-04-15 05:29:35,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:35,741 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:35,742 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:35,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-04-15 05:29:35,957 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:35,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:35,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-04-15 05:29:35,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:35,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610628722] [2021-04-15 05:29:35,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:35,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610628722] [2021-04-15 05:29:36,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445579068] [2021-04-15 05:29:36,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:36,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:29:36,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:36,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:36,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:36,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:36,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:29:36,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683533389] [2021-04-15 05:29:36,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:29:36,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:36,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:29:36,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:29:36,126 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:36,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:36,841 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-04-15 05:29:36,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 05:29:36,841 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:36,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:36,854 INFO L225 Difference]: With dead ends: 2734 [2021-04-15 05:29:36,854 INFO L226 Difference]: Without dead ends: 2734 [2021-04-15 05:29:36,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 437.7ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:29:36,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-04-15 05:29:36,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-04-15 05:29:36,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-04-15 05:29:36,888 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-04-15 05:29:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:36,889 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-04-15 05:29:36,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:36,889 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-04-15 05:29:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:36,891 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:36,891 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:37,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:37,097 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:37,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:37,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-04-15 05:29:37,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:37,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234889639] [2021-04-15 05:29:37,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:37,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234889639] [2021-04-15 05:29:37,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576126205] [2021-04-15 05:29:37,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:37,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:29:37,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:37,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:37,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:37,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:37,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:29:37,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533093234] [2021-04-15 05:29:37,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:29:37,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:37,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:29:37,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:29:37,276 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:37,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:37,957 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-04-15 05:29:37,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 05:29:37,957 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:37,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:37,965 INFO L225 Difference]: With dead ends: 2693 [2021-04-15 05:29:37,965 INFO L226 Difference]: Without dead ends: 2693 [2021-04-15 05:29:37,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 425.6ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:29:37,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-04-15 05:29:37,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-04-15 05:29:37,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:37,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-04-15 05:29:37,998 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-04-15 05:29:37,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:37,998 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-04-15 05:29:37,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:37,999 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-04-15 05:29:38,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:38,001 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:38,001 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:38,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-04-15 05:29:38,214 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:38,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:38,214 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-04-15 05:29:38,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:38,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208577594] [2021-04-15 05:29:38,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:38,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208577594] [2021-04-15 05:29:38,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183139684] [2021-04-15 05:29:38,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:29:38,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:29:38,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:38,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:38,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:38,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:38,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:29:38,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867525250] [2021-04-15 05:29:38,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:29:38,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:38,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:29:38,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:29:38,390 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:39,092 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-04-15 05:29:39,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 05:29:39,092 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:39,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:39,099 INFO L225 Difference]: With dead ends: 2677 [2021-04-15 05:29:39,099 INFO L226 Difference]: Without dead ends: 2677 [2021-04-15 05:29:39,100 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 433.9ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 05:29:39,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-04-15 05:29:39,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-04-15 05:29:39,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-04-15 05:29:39,131 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-04-15 05:29:39,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:39,131 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-04-15 05:29:39,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:39,132 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-04-15 05:29:39,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:39,134 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:39,134 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:39,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-04-15 05:29:39,349 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:39,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:39,349 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-04-15 05:29:39,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:39,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183739164] [2021-04-15 05:29:39,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:39,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183739164] [2021-04-15 05:29:39,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473662261] [2021-04-15 05:29:39,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:39,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:29:39,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:39,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:39,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:39,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:39,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:29:39,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913328587] [2021-04-15 05:29:39,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:29:39,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:39,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:29:39,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:29:39,478 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:40,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:40,038 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-04-15 05:29:40,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 05:29:40,038 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:40,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:40,044 INFO L225 Difference]: With dead ends: 2474 [2021-04-15 05:29:40,044 INFO L226 Difference]: Without dead ends: 2470 [2021-04-15 05:29:40,045 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 340.9ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 05:29:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-04-15 05:29:40,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-04-15 05:29:40,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:40,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-04-15 05:29:40,074 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-04-15 05:29:40,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:40,074 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-04-15 05:29:40,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:40,074 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-04-15 05:29:40,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:40,077 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:40,077 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:40,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-04-15 05:29:40,285 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:40,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:40,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-04-15 05:29:40,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:40,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311982638] [2021-04-15 05:29:40,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:40,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311982638] [2021-04-15 05:29:40,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943012935] [2021-04-15 05:29:40,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:40,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:29:40,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:40,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:40,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:40,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:40,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:29:40,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772466856] [2021-04-15 05:29:40,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:29:40,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:40,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:29:40,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:29:40,429 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:41,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:41,025 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-04-15 05:29:41,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 05:29:41,026 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:41,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:41,033 INFO L225 Difference]: With dead ends: 2514 [2021-04-15 05:29:41,033 INFO L226 Difference]: Without dead ends: 2514 [2021-04-15 05:29:41,034 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 358.7ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 05:29:41,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-04-15 05:29:41,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-04-15 05:29:41,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:41,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-04-15 05:29:41,064 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-04-15 05:29:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:41,064 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-04-15 05:29:41,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:41,064 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-04-15 05:29:41,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:41,066 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:41,067 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:41,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-04-15 05:29:41,284 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:41,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:41,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-04-15 05:29:41,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:41,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465627349] [2021-04-15 05:29:41,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:41,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465627349] [2021-04-15 05:29:41,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328969125] [2021-04-15 05:29:41,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:41,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:41,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:41,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:41,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:29:41,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099100283] [2021-04-15 05:29:41,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:29:41,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:41,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:29:41,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:29:41,448 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:42,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:42,043 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-04-15 05:29:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 05:29:42,044 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:42,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:42,050 INFO L225 Difference]: With dead ends: 2332 [2021-04-15 05:29:42,050 INFO L226 Difference]: Without dead ends: 2328 [2021-04-15 05:29:42,051 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 379.4ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 05:29:42,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-04-15 05:29:42,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-04-15 05:29:42,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:42,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-04-15 05:29:42,079 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-04-15 05:29:42,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:42,079 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-04-15 05:29:42,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:42,080 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-04-15 05:29:42,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:42,082 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:42,082 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:42,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-04-15 05:29:42,304 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:42,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:42,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-04-15 05:29:42,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:42,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267576364] [2021-04-15 05:29:42,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:42,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:29:42,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267576364] [2021-04-15 05:29:42,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596054685] [2021-04-15 05:29:42,332 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 [2021-04-15 05:29:42,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 05:29:42,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:42,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 05:29:42,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:29:42,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:42,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-04-15 05:29:42,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580996756] [2021-04-15 05:29:42,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:29:42,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:42,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:29:42,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:29:42,403 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:42,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:42,488 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-04-15 05:29:42,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 05:29:42,488 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:42,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:42,490 INFO L225 Difference]: With dead ends: 929 [2021-04-15 05:29:42,490 INFO L226 Difference]: Without dead ends: 929 [2021-04-15 05:29:42,491 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:29:42,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-04-15 05:29:42,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-04-15 05:29:42,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:42,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-04-15 05:29:42,511 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-04-15 05:29:42,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:42,512 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-04-15 05:29:42,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:42,512 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-04-15 05:29:42,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:42,514 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:42,514 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:42,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:42,741 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:42,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:42,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-04-15 05:29:42,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:42,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984387427] [2021-04-15 05:29:42,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:42,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:42,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984387427] [2021-04-15 05:29:42,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860899992] [2021-04-15 05:29:42,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:42,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:29:42,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:42,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:42,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:42,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:42,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-15 05:29:42,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444465468] [2021-04-15 05:29:42,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:29:42,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:42,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:29:42,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:29:42,866 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:43,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:43,144 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-04-15 05:29:43,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:29:43,144 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:43,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:43,148 INFO L225 Difference]: With dead ends: 1555 [2021-04-15 05:29:43,148 INFO L226 Difference]: Without dead ends: 1555 [2021-04-15 05:29:43,149 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:29:43,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-04-15 05:29:43,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-04-15 05:29:43,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:43,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-04-15 05:29:43,168 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-04-15 05:29:43,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:43,168 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-04-15 05:29:43,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:43,168 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-04-15 05:29:43,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:43,170 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:43,170 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:43,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-15 05:29:43,386 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:43,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:43,387 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-04-15 05:29:43,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:43,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995733226] [2021-04-15 05:29:43,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:43,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995733226] [2021-04-15 05:29:43,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116683550] [2021-04-15 05:29:43,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:43,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:29:43,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:43,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:43,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:43,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:43,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 05:29:43,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040298210] [2021-04-15 05:29:43,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 05:29:43,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:43,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 05:29:43,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:29:43,518 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:43,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:43,764 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-04-15 05:29:43,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:29:43,765 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:43,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:43,770 INFO L225 Difference]: With dead ends: 1605 [2021-04-15 05:29:43,770 INFO L226 Difference]: Without dead ends: 1605 [2021-04-15 05:29:43,770 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:29:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-04-15 05:29:43,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-04-15 05:29:43,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:43,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-04-15 05:29:43,791 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-04-15 05:29:43,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:43,791 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-04-15 05:29:43,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-04-15 05:29:43,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:43,793 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:43,793 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:44,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:44,009 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:44,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:44,009 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-04-15 05:29:44,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:44,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401085368] [2021-04-15 05:29:44,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:29:44,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401085368] [2021-04-15 05:29:44,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200668370] [2021-04-15 05:29:44,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:44,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:29:44,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:44,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:44,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:29:44,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:44,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 05:29:44,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516970485] [2021-04-15 05:29:44,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 05:29:44,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:44,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 05:29:44,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:29:44,126 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:44,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:44,320 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-04-15 05:29:44,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:29:44,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:44,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:44,324 INFO L225 Difference]: With dead ends: 1524 [2021-04-15 05:29:44,324 INFO L226 Difference]: Without dead ends: 1520 [2021-04-15 05:29:44,324 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:29:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-04-15 05:29:44,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-04-15 05:29:44,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:44,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-04-15 05:29:44,342 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-04-15 05:29:44,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:44,342 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-04-15 05:29:44,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:44,342 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-04-15 05:29:44,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:44,344 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:44,344 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:44,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-04-15 05:29:44,565 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:44,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:44,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-04-15 05:29:44,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:44,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453412831] [2021-04-15 05:29:44,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:44,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453412831] [2021-04-15 05:29:44,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648808127] [2021-04-15 05:29:44,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:44,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:29:44,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:44,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:44,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:44,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:44,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-15 05:29:44,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121135780] [2021-04-15 05:29:44,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:29:44,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:44,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:29:44,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:29:44,662 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:44,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:44,867 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-04-15 05:29:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:29:44,867 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:44,871 INFO L225 Difference]: With dead ends: 1508 [2021-04-15 05:29:44,871 INFO L226 Difference]: Without dead ends: 1496 [2021-04-15 05:29:44,871 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:29:44,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-04-15 05:29:44,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-04-15 05:29:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-04-15 05:29:44,891 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-04-15 05:29:44,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:44,892 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-04-15 05:29:44,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:44,892 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-04-15 05:29:44,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:44,894 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:44,894 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:45,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:45,116 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:45,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:45,117 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-04-15 05:29:45,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:45,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676490549] [2021-04-15 05:29:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:45,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676490549] [2021-04-15 05:29:45,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439804157] [2021-04-15 05:29:45,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:45,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:29:45,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:45,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:45,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:45,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:45,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:29:45,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847670090] [2021-04-15 05:29:45,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:29:45,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:45,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:29:45,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:29:45,261 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:45,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:45,780 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-04-15 05:29:45,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 05:29:45,781 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:45,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:45,788 INFO L225 Difference]: With dead ends: 2412 [2021-04-15 05:29:45,788 INFO L226 Difference]: Without dead ends: 2412 [2021-04-15 05:29:45,790 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 333.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:29:45,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-04-15 05:29:45,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-04-15 05:29:45,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:45,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-04-15 05:29:45,814 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-04-15 05:29:45,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:45,814 INFO L480 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-04-15 05:29:45,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:45,815 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-04-15 05:29:45,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:45,816 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:45,816 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:46,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-04-15 05:29:46,030 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:46,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:46,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-04-15 05:29:46,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:46,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290460427] [2021-04-15 05:29:46,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:46,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290460427] [2021-04-15 05:29:46,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691139314] [2021-04-15 05:29:46,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:46,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:46,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:46,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:46,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:29:46,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887590680] [2021-04-15 05:29:46,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:29:46,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:46,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:29:46,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:29:46,168 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:46,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:46,637 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-04-15 05:29:46,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 05:29:46,637 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:46,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:46,641 INFO L225 Difference]: With dead ends: 2335 [2021-04-15 05:29:46,641 INFO L226 Difference]: Without dead ends: 2335 [2021-04-15 05:29:46,642 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 316.5ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:29:46,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-04-15 05:29:46,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-04-15 05:29:46,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:46,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-04-15 05:29:46,662 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-04-15 05:29:46,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:46,662 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-04-15 05:29:46,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:46,663 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-04-15 05:29:46,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:46,665 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:46,665 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:46,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:46,879 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:46,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:46,879 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-04-15 05:29:46,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:46,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265568357] [2021-04-15 05:29:46,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:46,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265568357] [2021-04-15 05:29:46,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657796770] [2021-04-15 05:29:46,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:46,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:29:46,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:46,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:46,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:47,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:47,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:29:47,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121503116] [2021-04-15 05:29:47,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:29:47,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:47,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:29:47,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:29:47,001 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:47,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:47,385 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-04-15 05:29:47,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 05:29:47,385 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:47,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:47,389 INFO L225 Difference]: With dead ends: 2285 [2021-04-15 05:29:47,389 INFO L226 Difference]: Without dead ends: 2285 [2021-04-15 05:29:47,389 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:29:47,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-04-15 05:29:47,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-04-15 05:29:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:47,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-04-15 05:29:47,414 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-04-15 05:29:47,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:47,414 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-04-15 05:29:47,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:47,414 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-04-15 05:29:47,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:47,416 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:47,416 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:47,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-04-15 05:29:47,629 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:47,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:47,629 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-04-15 05:29:47,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:47,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242785924] [2021-04-15 05:29:47,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:47,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242785924] [2021-04-15 05:29:47,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172255515] [2021-04-15 05:29:47,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:47,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:29:47,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:47,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:47,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:47,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:47,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:29:47,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161847906] [2021-04-15 05:29:47,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:29:47,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:47,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:29:47,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:29:47,749 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:48,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:48,094 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-04-15 05:29:48,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:29:48,095 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:48,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:48,097 INFO L225 Difference]: With dead ends: 2176 [2021-04-15 05:29:48,097 INFO L226 Difference]: Without dead ends: 2172 [2021-04-15 05:29:48,098 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:29:48,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-04-15 05:29:48,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-04-15 05:29:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:48,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-04-15 05:29:48,117 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-04-15 05:29:48,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:48,117 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-04-15 05:29:48,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:48,117 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-04-15 05:29:48,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:48,118 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:48,118 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:48,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:48,319 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:48,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:48,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-04-15 05:29:48,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:48,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787219979] [2021-04-15 05:29:48,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:48,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787219979] [2021-04-15 05:29:48,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652630227] [2021-04-15 05:29:48,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:48,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:29:48,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:48,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:48,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:48,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:48,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:29:48,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003215464] [2021-04-15 05:29:48,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:29:48,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:48,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:29:48,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:29:48,448 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:48,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:48,820 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-04-15 05:29:48,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 05:29:48,820 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:48,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:48,823 INFO L225 Difference]: With dead ends: 2199 [2021-04-15 05:29:48,824 INFO L226 Difference]: Without dead ends: 2199 [2021-04-15 05:29:48,824 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 240.6ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:29:48,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-04-15 05:29:48,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-04-15 05:29:48,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:48,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-04-15 05:29:48,855 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-04-15 05:29:48,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:48,855 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-04-15 05:29:48,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:48,855 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-04-15 05:29:48,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:48,857 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:48,857 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:49,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-04-15 05:29:49,057 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:49,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:49,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-04-15 05:29:49,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:49,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174838068] [2021-04-15 05:29:49,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:49,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174838068] [2021-04-15 05:29:49,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416689810] [2021-04-15 05:29:49,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:49,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:29:49,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:49,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:49,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:49,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:49,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:29:49,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108560634] [2021-04-15 05:29:49,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:29:49,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:49,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:29:49,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:29:49,191 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:49,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:49,554 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-04-15 05:29:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:29:49,555 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:49,558 INFO L225 Difference]: With dead ends: 2156 [2021-04-15 05:29:49,558 INFO L226 Difference]: Without dead ends: 2152 [2021-04-15 05:29:49,558 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-04-15 05:29:49,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-04-15 05:29:49,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-04-15 05:29:49,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:49,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-04-15 05:29:49,583 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-04-15 05:29:49,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:49,583 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-04-15 05:29:49,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:49,583 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-04-15 05:29:49,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:49,585 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:49,585 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:49,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-04-15 05:29:49,801 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:49,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:49,801 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-04-15 05:29:49,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:49,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209251726] [2021-04-15 05:29:49,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:49,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209251726] [2021-04-15 05:29:49,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288408283] [2021-04-15 05:29:49,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:49,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:29:49,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:49,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:49,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:49,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:49,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:29:49,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822277823] [2021-04-15 05:29:49,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:29:49,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:49,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:29:49,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:29:49,932 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:50,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:50,253 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-04-15 05:29:50,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 05:29:50,253 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:50,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:50,256 INFO L225 Difference]: With dead ends: 2097 [2021-04-15 05:29:50,256 INFO L226 Difference]: Without dead ends: 2097 [2021-04-15 05:29:50,257 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:29:50,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-04-15 05:29:50,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-04-15 05:29:50,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:50,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-04-15 05:29:50,275 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-04-15 05:29:50,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:50,275 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-04-15 05:29:50,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:50,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-04-15 05:29:50,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:50,277 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:50,277 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:50,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-04-15 05:29:50,485 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:50,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:50,486 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-04-15 05:29:50,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:50,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952326868] [2021-04-15 05:29:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:50,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952326868] [2021-04-15 05:29:50,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597220475] [2021-04-15 05:29:50,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:29:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:50,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:50,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:50,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:50,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:29:50,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690682863] [2021-04-15 05:29:50,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:29:50,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:50,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:29:50,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:29:50,644 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:50,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:50,951 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-04-15 05:29:50,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:29:50,951 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:50,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:50,954 INFO L225 Difference]: With dead ends: 1963 [2021-04-15 05:29:50,954 INFO L226 Difference]: Without dead ends: 1959 [2021-04-15 05:29:50,954 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:29:50,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-04-15 05:29:50,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-04-15 05:29:50,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-04-15 05:29:50,976 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-04-15 05:29:50,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:50,976 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-04-15 05:29:50,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:50,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-04-15 05:29:50,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:50,978 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:50,978 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:51,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-04-15 05:29:51,199 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:51,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:51,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-04-15 05:29:51,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:51,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492462846] [2021-04-15 05:29:51,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:51,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492462846] [2021-04-15 05:29:51,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779653348] [2021-04-15 05:29:51,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:51,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:29:51,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:51,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:51,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:51,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:51,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:29:51,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163679190] [2021-04-15 05:29:51,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:29:51,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:51,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:29:51,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:29:51,304 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:51,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:51,495 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-04-15 05:29:51,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:29:51,495 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:51,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:51,497 INFO L225 Difference]: With dead ends: 1728 [2021-04-15 05:29:51,497 INFO L226 Difference]: Without dead ends: 1716 [2021-04-15 05:29:51,498 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:29:51,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-04-15 05:29:51,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-04-15 05:29:51,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:51,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-04-15 05:29:51,512 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-04-15 05:29:51,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:51,512 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-04-15 05:29:51,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:51,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-04-15 05:29:51,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:51,514 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:51,514 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:51,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:51,717 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:51,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:51,717 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-04-15 05:29:51,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:51,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328883844] [2021-04-15 05:29:51,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:51,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328883844] [2021-04-15 05:29:51,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626504548] [2021-04-15 05:29:51,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:29:51,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:29:51,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:51,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:51,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:51,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:51,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:29:51,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373719630] [2021-04-15 05:29:51,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:29:51,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:51,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:29:51,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:29:51,880 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:52,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:52,217 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-04-15 05:29:52,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:29:52,217 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:52,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:52,220 INFO L225 Difference]: With dead ends: 1821 [2021-04-15 05:29:52,220 INFO L226 Difference]: Without dead ends: 1821 [2021-04-15 05:29:52,220 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-04-15 05:29:52,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-04-15 05:29:52,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-04-15 05:29:52,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:52,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-04-15 05:29:52,238 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-04-15 05:29:52,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:52,238 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-04-15 05:29:52,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:52,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-04-15 05:29:52,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:52,241 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:52,241 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:52,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-04-15 05:29:52,454 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:52,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:52,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-04-15 05:29:52,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:52,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923315118] [2021-04-15 05:29:52,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:52,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923315118] [2021-04-15 05:29:52,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994053241] [2021-04-15 05:29:52,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:52,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:29:52,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:52,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:52,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:52,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:52,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:29:52,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970796021] [2021-04-15 05:29:52,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:29:52,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:52,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:29:52,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:29:52,586 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:52,858 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-04-15 05:29:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:29:52,858 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:52,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:52,861 INFO L225 Difference]: With dead ends: 1790 [2021-04-15 05:29:52,861 INFO L226 Difference]: Without dead ends: 1786 [2021-04-15 05:29:52,861 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:29:52,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-04-15 05:29:52,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-04-15 05:29:52,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:52,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-04-15 05:29:52,878 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-04-15 05:29:52,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:52,878 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-04-15 05:29:52,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-04-15 05:29:52,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:29:52,880 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:52,880 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:53,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-04-15 05:29:53,080 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:53,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:53,081 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-04-15 05:29:53,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:53,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861149247] [2021-04-15 05:29:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:53,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861149247] [2021-04-15 05:29:53,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388172886] [2021-04-15 05:29:53,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:53,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:29:53,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:53,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:29:53,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:53,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:53,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:29:53,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237151169] [2021-04-15 05:29:53,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:29:53,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:53,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:29:53,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:29:53,213 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:53,375 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-04-15 05:29:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:29:53,375 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:29:53,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:53,377 INFO L225 Difference]: With dead ends: 1649 [2021-04-15 05:29:53,377 INFO L226 Difference]: Without dead ends: 1637 [2021-04-15 05:29:53,378 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:29:53,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-04-15 05:29:53,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-04-15 05:29:53,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-04-15 05:29:53,394 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-04-15 05:29:53,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:53,394 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-04-15 05:29:53,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:53,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-04-15 05:29:53,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:29:53,396 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:53,397 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:53,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:53,617 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:53,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:53,617 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-04-15 05:29:53,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:53,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039144950] [2021-04-15 05:29:53,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:53,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039144950] [2021-04-15 05:29:53,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051499022] [2021-04-15 05:29:53,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:53,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:29:53,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:53,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:29:53,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:54,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:29:54,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:29:54,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 05:29:54,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:29:54,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:29:54,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:29:54,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-04-15 05:29:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:54,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:54,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-04-15 05:29:54,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372665217] [2021-04-15 05:29:54,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:29:54,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:54,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:29:54,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:29:54,149 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:54,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:54,739 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-04-15 05:29:54,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:29:54,740 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:29:54,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:54,742 INFO L225 Difference]: With dead ends: 1517 [2021-04-15 05:29:54,742 INFO L226 Difference]: Without dead ends: 1502 [2021-04-15 05:29:54,742 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 683.4ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:29:54,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-04-15 05:29:54,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-04-15 05:29:54,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-04-15 05:29:54,758 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-04-15 05:29:54,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:54,758 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-04-15 05:29:54,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:54,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-04-15 05:29:54,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:29:54,760 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:54,760 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:54,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-04-15 05:29:54,960 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:54,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:54,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-04-15 05:29:54,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:54,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699070848] [2021-04-15 05:29:54,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:55,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699070848] [2021-04-15 05:29:55,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544244692] [2021-04-15 05:29:55,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:55,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:29:55,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:55,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:29:55,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:55,475 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-04-15 05:29:55,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 49 [2021-04-15 05:29:55,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:29:55,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:29:55,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:29:55,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-04-15 05:29:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:55,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:55,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:29:55,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366805341] [2021-04-15 05:29:55,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:29:55,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:55,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:29:55,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:29:55,514 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:56,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:56,413 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-04-15 05:29:56,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 05:29:56,414 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:29:56,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:56,434 INFO L225 Difference]: With dead ends: 1495 [2021-04-15 05:29:56,434 INFO L226 Difference]: Without dead ends: 1480 [2021-04-15 05:29:56,434 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 892.0ms TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-04-15 05:29:56,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-04-15 05:29:56,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-04-15 05:29:56,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:56,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-04-15 05:29:56,449 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-04-15 05:29:56,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:56,451 INFO L480 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-04-15 05:29:56,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:56,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-04-15 05:29:56,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:29:56,453 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:56,453 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:56,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:56,669 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:56,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:56,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-04-15 05:29:56,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:56,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98536159] [2021-04-15 05:29:56,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:57,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98536159] [2021-04-15 05:29:57,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864599784] [2021-04-15 05:29:57,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:57,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:29:57,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:57,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:29:57,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:57,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:29:57,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:29:57,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:29:57,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:29:57,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-04-15 05:29:57,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:29:57,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:29:57,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:29:57,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-04-15 05:29:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:57,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:57,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-04-15 05:29:57,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855220336] [2021-04-15 05:29:57,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:29:57,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:57,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:29:57,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:29:57,229 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:59,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:59,326 INFO L93 Difference]: Finished difference Result 1658 states and 5345 transitions. [2021-04-15 05:29:59,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 05:29:59,326 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:29:59,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:59,329 INFO L225 Difference]: With dead ends: 1658 [2021-04-15 05:29:59,329 INFO L226 Difference]: Without dead ends: 1643 [2021-04-15 05:29:59,330 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 2056.8ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 05:29:59,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-04-15 05:29:59,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1180. [2021-04-15 05:29:59,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:59,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-04-15 05:29:59,345 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-04-15 05:29:59,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:59,345 INFO L480 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-04-15 05:29:59,345 INFO L481 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) [2021-04-15 05:29:59,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-04-15 05:29:59,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:29:59,347 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:59,347 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:59,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-04-15 05:29:59,548 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:59,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:59,548 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-04-15 05:29:59,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:59,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851773737] [2021-04-15 05:29:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:59,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851773737] [2021-04-15 05:29:59,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020840837] [2021-04-15 05:29:59,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:59,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:29:59,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:59,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:29:59,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:00,060 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-04-15 05:30:00,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-04-15 05:30:00,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:30:00,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:00,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:00,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:22 [2021-04-15 05:30:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:00,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:00,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-04-15 05:30:00,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052869481] [2021-04-15 05:30:00,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:30:00,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:00,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:30:00,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:30:00,116 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:01,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:01,826 INFO L93 Difference]: Finished difference Result 1843 states and 5867 transitions. [2021-04-15 05:30:01,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:30:01,826 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:01,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:01,829 INFO L225 Difference]: With dead ends: 1843 [2021-04-15 05:30:01,829 INFO L226 Difference]: Without dead ends: 1828 [2021-04-15 05:30:01,829 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1399.9ms TimeCoverageRelationStatistics Valid=276, Invalid=1530, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 05:30:01,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-04-15 05:30:01,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1198. [2021-04-15 05:30:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-04-15 05:30:01,846 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-04-15 05:30:01,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:01,847 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-04-15 05:30:01,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-04-15 05:30:01,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:01,849 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:01,849 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:02,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:02,050 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:02,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:02,050 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-04-15 05:30:02,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:02,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402011522] [2021-04-15 05:30:02,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:02,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:02,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402011522] [2021-04-15 05:30:02,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563314549] [2021-04-15 05:30:02,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:30:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:02,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:30:02,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:02,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:02,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:02,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:30:02,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:30:02,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-04-15 05:30:02,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:30:02,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:02,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:02,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-04-15 05:30:02,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:02,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:02,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-04-15 05:30:02,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963802417] [2021-04-15 05:30:02,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:30:02,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:02,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:30:02,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:30:02,766 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:04,402 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-04-15 05:30:05,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:05,110 INFO L93 Difference]: Finished difference Result 1877 states and 5988 transitions. [2021-04-15 05:30:05,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 05:30:05,111 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:05,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:05,114 INFO L225 Difference]: With dead ends: 1877 [2021-04-15 05:30:05,114 INFO L226 Difference]: Without dead ends: 1862 [2021-04-15 05:30:05,115 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 2107.1ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:30:05,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-04-15 05:30:05,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1206. [2021-04-15 05:30:05,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:05,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-04-15 05:30:05,132 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-04-15 05:30:05,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:05,132 INFO L480 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-04-15 05:30:05,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:05,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-04-15 05:30:05,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:05,134 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:05,135 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:05,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-04-15 05:30:05,335 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:05,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:05,336 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-04-15 05:30:05,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:05,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594087669] [2021-04-15 05:30:05,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:05,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594087669] [2021-04-15 05:30:05,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269718799] [2021-04-15 05:30:05,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:05,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:30:05,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:05,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:30:05,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:05,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:05,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:05,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:05,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-04-15 05:30:05,986 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-04-15 05:30:06,008 INFO L628 ElimStorePlain]: treesize reduction 19, result has 57.8 percent of original size [2021-04-15 05:30:06,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:06,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:38 [2021-04-15 05:30:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:06,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:06,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-04-15 05:30:06,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124388636] [2021-04-15 05:30:06,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:30:06,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:06,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:30:06,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:30:06,113 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:07,565 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-04-15 05:30:08,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:08,027 INFO L93 Difference]: Finished difference Result 2109 states and 6703 transitions. [2021-04-15 05:30:08,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 05:30:08,028 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:08,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:08,031 INFO L225 Difference]: With dead ends: 2109 [2021-04-15 05:30:08,031 INFO L226 Difference]: Without dead ends: 2094 [2021-04-15 05:30:08,031 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1640.7ms TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 05:30:08,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2021-04-15 05:30:08,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 1219. [2021-04-15 05:30:08,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.3505747126436782) internal successors, (4081), 1218 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:08,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 4081 transitions. [2021-04-15 05:30:08,048 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 4081 transitions. Word has length 26 [2021-04-15 05:30:08,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:08,048 INFO L480 AbstractCegarLoop]: Abstraction has 1219 states and 4081 transitions. [2021-04-15 05:30:08,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:08,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 4081 transitions. [2021-04-15 05:30:08,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:08,050 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:08,050 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:08,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-04-15 05:30:08,251 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:08,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:08,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-04-15 05:30:08,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:08,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362836540] [2021-04-15 05:30:08,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:08,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362836540] [2021-04-15 05:30:08,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419409608] [2021-04-15 05:30:08,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:30:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:08,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:30:08,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:08,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:08,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:30:08,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 05:30:08,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:30:08,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:08,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:08,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-04-15 05:30:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:08,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:08,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-04-15 05:30:08,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882658379] [2021-04-15 05:30:08,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:30:08,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:08,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:30:08,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:30:08,779 INFO L87 Difference]: Start difference. First operand 1219 states and 4081 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:09,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:09,447 INFO L93 Difference]: Finished difference Result 1622 states and 5290 transitions. [2021-04-15 05:30:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:30:09,447 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:09,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:09,450 INFO L225 Difference]: With dead ends: 1622 [2021-04-15 05:30:09,450 INFO L226 Difference]: Without dead ends: 1607 [2021-04-15 05:30:09,450 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 717.3ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:30:09,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-04-15 05:30:09,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1230. [2021-04-15 05:30:09,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.3474369406021154) internal successors, (4114), 1229 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:09,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 4114 transitions. [2021-04-15 05:30:09,469 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 4114 transitions. Word has length 26 [2021-04-15 05:30:09,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:09,469 INFO L480 AbstractCegarLoop]: Abstraction has 1230 states and 4114 transitions. [2021-04-15 05:30:09,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:09,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 4114 transitions. [2021-04-15 05:30:09,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:09,471 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:09,471 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:09,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-04-15 05:30:09,691 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:09,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:09,691 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-04-15 05:30:09,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:09,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968852269] [2021-04-15 05:30:09,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:09,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:09,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968852269] [2021-04-15 05:30:09,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280348736] [2021-04-15 05:30:09,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:09,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:30:09,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:09,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:30:09,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:10,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:10,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:10,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-04-15 05:30:10,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:30:10,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:10,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:10,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:35 [2021-04-15 05:30:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:10,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:10,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:30:10,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706104281] [2021-04-15 05:30:10,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:30:10,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:10,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:30:10,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:30:10,322 INFO L87 Difference]: Start difference. First operand 1230 states and 4114 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:12,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:12,186 INFO L93 Difference]: Finished difference Result 1847 states and 5891 transitions. [2021-04-15 05:30:12,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 05:30:12,187 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:12,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:12,190 INFO L225 Difference]: With dead ends: 1847 [2021-04-15 05:30:12,190 INFO L226 Difference]: Without dead ends: 1832 [2021-04-15 05:30:12,191 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1524.4ms TimeCoverageRelationStatistics Valid=298, Invalid=1682, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 05:30:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-04-15 05:30:12,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1241. [2021-04-15 05:30:12,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.356451612903226) internal successors, (4162), 1240 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:12,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4162 transitions. [2021-04-15 05:30:12,210 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4162 transitions. Word has length 26 [2021-04-15 05:30:12,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:12,210 INFO L480 AbstractCegarLoop]: Abstraction has 1241 states and 4162 transitions. [2021-04-15 05:30:12,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:12,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4162 transitions. [2021-04-15 05:30:12,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:12,212 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:12,212 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:12,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-04-15 05:30:12,414 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:12,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:12,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-04-15 05:30:12,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:12,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082770874] [2021-04-15 05:30:12,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:12,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082770874] [2021-04-15 05:30:12,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569760150] [2021-04-15 05:30:12,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:12,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:30:12,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:12,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:30:12,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:12,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:12,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:30:12,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 05:30:12,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:30:12,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:12,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:12,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-04-15 05:30:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:12,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:12,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-04-15 05:30:12,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079315444] [2021-04-15 05:30:12,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:30:12,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:12,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:30:12,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:30:12,925 INFO L87 Difference]: Start difference. First operand 1241 states and 4162 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:13,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:13,774 INFO L93 Difference]: Finished difference Result 1876 states and 6095 transitions. [2021-04-15 05:30:13,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:30:13,775 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:13,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:13,778 INFO L225 Difference]: With dead ends: 1876 [2021-04-15 05:30:13,778 INFO L226 Difference]: Without dead ends: 1861 [2021-04-15 05:30:13,779 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 795.8ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-04-15 05:30:13,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-04-15 05:30:13,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1250. [2021-04-15 05:30:13,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.3610888710968774) internal successors, (4198), 1249 states have internal predecessors, (4198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:13,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4198 transitions. [2021-04-15 05:30:13,800 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4198 transitions. Word has length 26 [2021-04-15 05:30:13,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:13,800 INFO L480 AbstractCegarLoop]: Abstraction has 1250 states and 4198 transitions. [2021-04-15 05:30:13,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:13,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4198 transitions. [2021-04-15 05:30:13,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:13,802 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:13,802 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:14,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:14,003 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:14,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:14,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-04-15 05:30:14,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:14,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497898324] [2021-04-15 05:30:14,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:14,269 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2021-04-15 05:30:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:14,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497898324] [2021-04-15 05:30:14,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455433178] [2021-04-15 05:30:14,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:14,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:30:14,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:14,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:30:14,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:14,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:14,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:30:14,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 05:30:14,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:30:14,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:14,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:14,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-04-15 05:30:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:14,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:14,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-04-15 05:30:14,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325440004] [2021-04-15 05:30:14,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:30:14,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:14,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:30:14,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:30:14,695 INFO L87 Difference]: Start difference. First operand 1250 states and 4198 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:15,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:15,130 INFO L93 Difference]: Finished difference Result 1393 states and 4580 transitions. [2021-04-15 05:30:15,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 05:30:15,131 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:15,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:15,133 INFO L225 Difference]: With dead ends: 1393 [2021-04-15 05:30:15,133 INFO L226 Difference]: Without dead ends: 1378 [2021-04-15 05:30:15,133 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 628.8ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:30:15,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-04-15 05:30:15,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1246. [2021-04-15 05:30:15,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-04-15 05:30:15,149 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-04-15 05:30:15,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:15,149 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-04-15 05:30:15,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:15,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-04-15 05:30:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:15,151 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:15,151 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:15,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:15,352 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:15,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:15,352 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-04-15 05:30:15,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:15,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850679633] [2021-04-15 05:30:15,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:15,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850679633] [2021-04-15 05:30:15,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243203877] [2021-04-15 05:30:15,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:15,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:30:15,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:15,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:30:15,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:15,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:15,787 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-04-15 05:30:15,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 76 treesize of output 59 [2021-04-15 05:30:15,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:30:15,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:15,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:15,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:21 [2021-04-15 05:30:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:15,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:15,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:30:15,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047429986] [2021-04-15 05:30:15,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:30:15,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:15,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:30:15,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:30:15,881 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:17,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:17,506 INFO L93 Difference]: Finished difference Result 2076 states and 6735 transitions. [2021-04-15 05:30:17,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 05:30:17,507 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:17,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:17,511 INFO L225 Difference]: With dead ends: 2076 [2021-04-15 05:30:17,511 INFO L226 Difference]: Without dead ends: 2061 [2021-04-15 05:30:17,511 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1311.8ms TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 05:30:17,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-04-15 05:30:17,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1246. [2021-04-15 05:30:17,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:17,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-04-15 05:30:17,532 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-04-15 05:30:17,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:17,532 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-04-15 05:30:17,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:17,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-04-15 05:30:17,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:17,534 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:17,534 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:17,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-04-15 05:30:17,735 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:17,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:17,735 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 12 times [2021-04-15 05:30:17,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:17,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528733394] [2021-04-15 05:30:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:17,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528733394] [2021-04-15 05:30:17,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492280141] [2021-04-15 05:30:17,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:30:18,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:30:18,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:18,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:30:18,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:18,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:18,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:18,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-04-15 05:30:18,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:30:18,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:18,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:18,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-04-15 05:30:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:18,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:18,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-04-15 05:30:18,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349894211] [2021-04-15 05:30:18,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:30:18,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:18,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:30:18,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:30:18,260 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:19,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:19,922 INFO L93 Difference]: Finished difference Result 1890 states and 6145 transitions. [2021-04-15 05:30:19,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 05:30:19,923 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:19,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:19,926 INFO L225 Difference]: With dead ends: 1890 [2021-04-15 05:30:19,926 INFO L226 Difference]: Without dead ends: 1875 [2021-04-15 05:30:19,926 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1453.0ms TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 05:30:19,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-04-15 05:30:19,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1246. [2021-04-15 05:30:19,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:19,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-04-15 05:30:19,946 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-04-15 05:30:19,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:19,946 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-04-15 05:30:19,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:19,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-04-15 05:30:19,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:19,948 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:19,948 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:20,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-04-15 05:30:20,148 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:20,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:20,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-04-15 05:30:20,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:20,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842621903] [2021-04-15 05:30:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:20,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842621903] [2021-04-15 05:30:20,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976756459] [2021-04-15 05:30:20,398 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 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 [2021-04-15 05:30:20,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:30:20,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:20,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:30:20,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:20,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:30:20,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:20,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:20,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:30:20,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-04-15 05:30:20,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:30:20,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:20,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:20,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-04-15 05:30:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:20,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:20,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-04-15 05:30:20,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127781116] [2021-04-15 05:30:20,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:30:20,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:20,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:30:20,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:30:20,675 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:22,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:22,965 INFO L93 Difference]: Finished difference Result 2938 states and 9138 transitions. [2021-04-15 05:30:22,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 05:30:22,966 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:22,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:22,971 INFO L225 Difference]: With dead ends: 2938 [2021-04-15 05:30:22,971 INFO L226 Difference]: Without dead ends: 2893 [2021-04-15 05:30:22,972 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1988.5ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 05:30:22,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-04-15 05:30:22,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 1292. [2021-04-15 05:30:22,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.375677769171185) internal successors, (4358), 1291 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:22,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4358 transitions. [2021-04-15 05:30:22,998 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4358 transitions. Word has length 26 [2021-04-15 05:30:22,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:22,999 INFO L480 AbstractCegarLoop]: Abstraction has 1292 states and 4358 transitions. [2021-04-15 05:30:22,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:22,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4358 transitions. [2021-04-15 05:30:23,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:23,001 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:23,001 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:23,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:23,205 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:23,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:23,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-04-15 05:30:23,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:23,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810293222] [2021-04-15 05:30:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:23,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810293222] [2021-04-15 05:30:23,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123201945] [2021-04-15 05:30:23,471 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 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 [2021-04-15 05:30:23,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:30:23,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:23,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:30:23,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:23,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:23,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:30:23,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:30:23,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-04-15 05:30:23,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:30:23,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:23,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:23,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-04-15 05:30:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:23,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:23,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-04-15 05:30:23,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707675047] [2021-04-15 05:30:23,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:30:23,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:23,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:30:23,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:30:23,678 INFO L87 Difference]: Start difference. First operand 1292 states and 4358 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:25,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:25,658 INFO L93 Difference]: Finished difference Result 2772 states and 8760 transitions. [2021-04-15 05:30:25,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 05:30:25,659 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:25,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:25,664 INFO L225 Difference]: With dead ends: 2772 [2021-04-15 05:30:25,664 INFO L226 Difference]: Without dead ends: 2727 [2021-04-15 05:30:25,664 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1738.9ms TimeCoverageRelationStatistics Valid=462, Invalid=1988, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 05:30:25,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2021-04-15 05:30:25,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 1288. [2021-04-15 05:30:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3846153846153846) internal successors, (4356), 1287 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:25,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4356 transitions. [2021-04-15 05:30:25,689 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4356 transitions. Word has length 26 [2021-04-15 05:30:25,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:25,689 INFO L480 AbstractCegarLoop]: Abstraction has 1288 states and 4356 transitions. [2021-04-15 05:30:25,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:25,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4356 transitions. [2021-04-15 05:30:25,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:25,691 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:25,691 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:25,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:25,892 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:25,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:25,892 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-04-15 05:30:25,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:25,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096766914] [2021-04-15 05:30:25,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:26,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096766914] [2021-04-15 05:30:26,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690732695] [2021-04-15 05:30:26,199 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 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 [2021-04-15 05:30:26,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:30:26,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:26,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:30:26,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:26,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:26,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:26,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:26,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-04-15 05:30:26,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:30:26,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:26,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:26,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-04-15 05:30:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:26,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:26,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-04-15 05:30:26,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911777572] [2021-04-15 05:30:26,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:30:26,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:26,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:30:26,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:30:26,460 INFO L87 Difference]: Start difference. First operand 1288 states and 4356 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:29,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:29,149 INFO L93 Difference]: Finished difference Result 3091 states and 9690 transitions. [2021-04-15 05:30:29,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 05:30:29,150 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:29,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:29,155 INFO L225 Difference]: With dead ends: 3091 [2021-04-15 05:30:29,155 INFO L226 Difference]: Without dead ends: 3046 [2021-04-15 05:30:29,155 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 2306.2ms TimeCoverageRelationStatistics Valid=623, Invalid=2457, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 05:30:29,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2021-04-15 05:30:29,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 1292. [2021-04-15 05:30:29,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.3903950426026337) internal successors, (4377), 1291 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4377 transitions. [2021-04-15 05:30:29,181 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4377 transitions. Word has length 26 [2021-04-15 05:30:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:29,181 INFO L480 AbstractCegarLoop]: Abstraction has 1292 states and 4377 transitions. [2021-04-15 05:30:29,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:29,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4377 transitions. [2021-04-15 05:30:29,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:29,184 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:29,184 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:29,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-04-15 05:30:29,393 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:29,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:29,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-04-15 05:30:29,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:29,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701395382] [2021-04-15 05:30:29,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:29,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701395382] [2021-04-15 05:30:29,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617835130] [2021-04-15 05:30:29,610 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 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 [2021-04-15 05:30:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:29,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:30:29,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:29,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:29,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:30:29,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 05:30:29,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:30:29,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:29,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:29,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-04-15 05:30:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:29,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:29,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-04-15 05:30:29,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308394728] [2021-04-15 05:30:29,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:30:29,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:29,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:30:29,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:30:29,863 INFO L87 Difference]: Start difference. First operand 1292 states and 4377 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:30,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:30,373 INFO L93 Difference]: Finished difference Result 1654 states and 5477 transitions. [2021-04-15 05:30:30,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:30:30,374 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:30,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:30,377 INFO L225 Difference]: With dead ends: 1654 [2021-04-15 05:30:30,377 INFO L226 Difference]: Without dead ends: 1639 [2021-04-15 05:30:30,377 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 578.5ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:30:30,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-04-15 05:30:30,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1309. [2021-04-15 05:30:30,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.385321100917431) internal successors, (4428), 1308 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:30,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4428 transitions. [2021-04-15 05:30:30,395 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4428 transitions. Word has length 26 [2021-04-15 05:30:30,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:30,395 INFO L480 AbstractCegarLoop]: Abstraction has 1309 states and 4428 transitions. [2021-04-15 05:30:30,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:30,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4428 transitions. [2021-04-15 05:30:30,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:30,398 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:30,398 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:30,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-04-15 05:30:30,598 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:30,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:30,599 INFO L82 PathProgramCache]: Analyzing trace with hash 950706158, now seen corresponding path program 14 times [2021-04-15 05:30:30,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:30,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232539640] [2021-04-15 05:30:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:30,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232539640] [2021-04-15 05:30:30,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021840503] [2021-04-15 05:30:30,856 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 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 [2021-04-15 05:30:30,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:30:30,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:30,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:30:30,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:31,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:31,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-04-15 05:30:31,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:30:31,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:31,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:31,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:91 [2021-04-15 05:30:31,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:31,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:31,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:30:31,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509981904] [2021-04-15 05:30:31,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:30:31,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:31,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:30:31,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:30:31,238 INFO L87 Difference]: Start difference. First operand 1309 states and 4428 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:32,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:32,925 INFO L93 Difference]: Finished difference Result 1924 states and 6179 transitions. [2021-04-15 05:30:32,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 05:30:32,926 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:32,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:32,929 INFO L225 Difference]: With dead ends: 1924 [2021-04-15 05:30:32,929 INFO L226 Difference]: Without dead ends: 1894 [2021-04-15 05:30:32,929 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1432.8ms TimeCoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 05:30:32,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-04-15 05:30:32,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1297. [2021-04-15 05:30:32,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.385030864197531) internal successors, (4387), 1296 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-04-15 05:30:32,949 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-04-15 05:30:32,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:32,949 INFO L480 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-04-15 05:30:32,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:32,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-04-15 05:30:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:32,951 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:32,951 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:33,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:33,153 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:33,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:33,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1553655630, now seen corresponding path program 15 times [2021-04-15 05:30:33,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:33,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291549162] [2021-04-15 05:30:33,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:33,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291549162] [2021-04-15 05:30:33,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250396657] [2021-04-15 05:30:33,423 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 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 [2021-04-15 05:30:33,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:30:33,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:33,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 05:30:33,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:33,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:33,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-04-15 05:30:33,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:30:33,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:33,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:33,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:77 [2021-04-15 05:30:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:33,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:33,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-04-15 05:30:33,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088150461] [2021-04-15 05:30:33,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:30:33,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:33,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:30:33,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:30:33,756 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:35,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:35,219 INFO L93 Difference]: Finished difference Result 2000 states and 6503 transitions. [2021-04-15 05:30:35,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:30:35,219 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:35,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:35,222 INFO L225 Difference]: With dead ends: 2000 [2021-04-15 05:30:35,222 INFO L226 Difference]: Without dead ends: 1985 [2021-04-15 05:30:35,223 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1250.3ms TimeCoverageRelationStatistics Valid=209, Invalid=1273, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:30:35,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-04-15 05:30:35,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1306. [2021-04-15 05:30:35,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.389272030651341) internal successors, (4423), 1305 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:35,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4423 transitions. [2021-04-15 05:30:35,250 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4423 transitions. Word has length 26 [2021-04-15 05:30:35,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:35,250 INFO L480 AbstractCegarLoop]: Abstraction has 1306 states and 4423 transitions. [2021-04-15 05:30:35,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:35,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4423 transitions. [2021-04-15 05:30:35,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:35,253 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:35,253 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:35,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:35,469 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:35,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:35,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 16 times [2021-04-15 05:30:35,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:35,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809311281] [2021-04-15 05:30:35,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:35,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809311281] [2021-04-15 05:30:35,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911358273] [2021-04-15 05:30:35,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:35,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:30:35,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:35,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:30:35,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:35,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:35,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:30:35,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 05:30:35,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:30:35,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:35,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:35,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-04-15 05:30:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:36,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:36,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-04-15 05:30:36,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324383086] [2021-04-15 05:30:36,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:30:36,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:36,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:30:36,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:30:36,015 INFO L87 Difference]: Start difference. First operand 1306 states and 4423 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:36,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:36,327 INFO L93 Difference]: Finished difference Result 1441 states and 4791 transitions. [2021-04-15 05:30:36,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 05:30:36,327 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:36,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:36,330 INFO L225 Difference]: With dead ends: 1441 [2021-04-15 05:30:36,330 INFO L226 Difference]: Without dead ends: 1426 [2021-04-15 05:30:36,330 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 464.5ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:30:36,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-04-15 05:30:36,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1309. [2021-04-15 05:30:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.3929663608562692) internal successors, (4438), 1308 states have internal predecessors, (4438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:36,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4438 transitions. [2021-04-15 05:30:36,346 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4438 transitions. Word has length 26 [2021-04-15 05:30:36,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:36,346 INFO L480 AbstractCegarLoop]: Abstraction has 1309 states and 4438 transitions. [2021-04-15 05:30:36,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:36,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4438 transitions. [2021-04-15 05:30:36,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:36,348 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:36,348 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:36,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:36,549 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:36,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:36,549 INFO L82 PathProgramCache]: Analyzing trace with hash 505986546, now seen corresponding path program 17 times [2021-04-15 05:30:36,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:36,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046508778] [2021-04-15 05:30:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:36,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046508778] [2021-04-15 05:30:36,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204540309] [2021-04-15 05:30:36,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:30:36,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:30:36,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:36,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:30:36,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:37,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:37,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:37,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-04-15 05:30:37,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:30:37,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:37,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:37,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2021-04-15 05:30:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:37,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:37,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:30:37,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29677877] [2021-04-15 05:30:37,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:30:37,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:37,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:30:37,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:30:37,146 INFO L87 Difference]: Start difference. First operand 1309 states and 4438 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:38,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:38,586 INFO L93 Difference]: Finished difference Result 2201 states and 7163 transitions. [2021-04-15 05:30:38,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:30:38,586 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:38,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:38,590 INFO L225 Difference]: With dead ends: 2201 [2021-04-15 05:30:38,590 INFO L226 Difference]: Without dead ends: 2171 [2021-04-15 05:30:38,590 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1307.6ms TimeCoverageRelationStatistics Valid=254, Invalid=1228, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:30:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-04-15 05:30:38,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 1306. [2021-04-15 05:30:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.389272030651341) internal successors, (4423), 1305 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:38,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4423 transitions. [2021-04-15 05:30:38,621 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4423 transitions. Word has length 26 [2021-04-15 05:30:38,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:38,621 INFO L480 AbstractCegarLoop]: Abstraction has 1306 states and 4423 transitions. [2021-04-15 05:30:38,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:38,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4423 transitions. [2021-04-15 05:30:38,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:38,623 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:38,623 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:38,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-04-15 05:30:38,824 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:38,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:38,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 18 times [2021-04-15 05:30:38,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:38,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303270318] [2021-04-15 05:30:38,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:39,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303270318] [2021-04-15 05:30:39,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764522799] [2021-04-15 05:30:39,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:30:39,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:30:39,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:39,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:30:39,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:39,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:39,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:39,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-04-15 05:30:39,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:30:39,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:39,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:39,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-04-15 05:30:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:39,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:39,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-04-15 05:30:39,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678879522] [2021-04-15 05:30:39,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:30:39,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:39,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:30:39,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:30:39,283 INFO L87 Difference]: Start difference. First operand 1306 states and 4423 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:40,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:40,471 INFO L93 Difference]: Finished difference Result 1909 states and 6282 transitions. [2021-04-15 05:30:40,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 05:30:40,472 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:40,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:40,475 INFO L225 Difference]: With dead ends: 1909 [2021-04-15 05:30:40,475 INFO L226 Difference]: Without dead ends: 1894 [2021-04-15 05:30:40,475 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1066.9ms TimeCoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 05:30:40,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-04-15 05:30:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1303. [2021-04-15 05:30:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.387864823348694) internal successors, (4411), 1302 states have internal predecessors, (4411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:40,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4411 transitions. [2021-04-15 05:30:40,500 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4411 transitions. Word has length 26 [2021-04-15 05:30:40,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:40,500 INFO L480 AbstractCegarLoop]: Abstraction has 1303 states and 4411 transitions. [2021-04-15 05:30:40,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:40,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4411 transitions. [2021-04-15 05:30:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:40,503 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:40,503 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:40,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:40,719 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:40,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:40,720 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 19 times [2021-04-15 05:30:40,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:40,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534939738] [2021-04-15 05:30:40,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:40,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534939738] [2021-04-15 05:30:40,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401246847] [2021-04-15 05:30:40,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:30:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:41,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:30:41,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:41,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:41,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:30:41,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 05:30:41,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:30:41,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:41,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:41,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-04-15 05:30:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:41,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:41,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-04-15 05:30:41,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247081457] [2021-04-15 05:30:41,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:30:41,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:41,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:30:41,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:30:41,279 INFO L87 Difference]: Start difference. First operand 1303 states and 4411 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:41,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:41,877 INFO L93 Difference]: Finished difference Result 1736 states and 5716 transitions. [2021-04-15 05:30:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:30:41,878 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:41,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:41,881 INFO L225 Difference]: With dead ends: 1736 [2021-04-15 05:30:41,881 INFO L226 Difference]: Without dead ends: 1715 [2021-04-15 05:30:41,881 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 687.3ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:30:41,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-04-15 05:30:41,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1344. [2021-04-15 05:30:41,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 3.3827252419955323) internal successors, (4543), 1343 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:41,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4543 transitions. [2021-04-15 05:30:41,907 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4543 transitions. Word has length 26 [2021-04-15 05:30:41,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:41,907 INFO L480 AbstractCegarLoop]: Abstraction has 1344 states and 4543 transitions. [2021-04-15 05:30:41,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:41,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4543 transitions. [2021-04-15 05:30:41,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:41,910 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:41,910 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:42,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-04-15 05:30:42,133 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:42,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:42,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 20 times [2021-04-15 05:30:42,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:42,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453760376] [2021-04-15 05:30:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:42,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453760376] [2021-04-15 05:30:42,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682322809] [2021-04-15 05:30:42,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:42,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:30:42,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:42,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 05:30:42,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:42,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:42,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-04-15 05:30:42,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:30:42,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:42,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:42,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:89 [2021-04-15 05:30:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:42,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:42,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-04-15 05:30:42,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324210121] [2021-04-15 05:30:42,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:30:42,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:42,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:30:42,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:30:42,817 INFO L87 Difference]: Start difference. First operand 1344 states and 4543 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:44,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:44,183 INFO L93 Difference]: Finished difference Result 1754 states and 5590 transitions. [2021-04-15 05:30:44,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:30:44,183 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:44,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:44,186 INFO L225 Difference]: With dead ends: 1754 [2021-04-15 05:30:44,187 INFO L226 Difference]: Without dead ends: 1729 [2021-04-15 05:30:44,187 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1285.3ms TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 05:30:44,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-04-15 05:30:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1358. [2021-04-15 05:30:44,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1357 states have (on average 3.3920412675018423) internal successors, (4603), 1357 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:44,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 4603 transitions. [2021-04-15 05:30:44,205 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 4603 transitions. Word has length 26 [2021-04-15 05:30:44,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:44,205 INFO L480 AbstractCegarLoop]: Abstraction has 1358 states and 4603 transitions. [2021-04-15 05:30:44,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:44,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 4603 transitions. [2021-04-15 05:30:44,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:44,207 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:44,207 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:44,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:44,408 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:44,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:44,409 INFO L82 PathProgramCache]: Analyzing trace with hash 2016041692, now seen corresponding path program 21 times [2021-04-15 05:30:44,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:44,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896371626] [2021-04-15 05:30:44,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:44,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896371626] [2021-04-15 05:30:44,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835262459] [2021-04-15 05:30:44,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:44,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:30:44,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:44,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:30:44,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:44,925 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-04-15 05:30:44,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-04-15 05:30:44,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:30:44,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:44,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:44,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:21 [2021-04-15 05:30:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:44,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:44,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-04-15 05:30:44,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111958899] [2021-04-15 05:30:44,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:30:44,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:44,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:30:44,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:30:44,991 INFO L87 Difference]: Start difference. First operand 1358 states and 4603 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:45,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:45,889 INFO L93 Difference]: Finished difference Result 1743 states and 5751 transitions. [2021-04-15 05:30:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:30:45,892 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:45,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:45,895 INFO L225 Difference]: With dead ends: 1743 [2021-04-15 05:30:45,895 INFO L226 Difference]: Without dead ends: 1714 [2021-04-15 05:30:45,896 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 924.1ms TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-04-15 05:30:45,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-04-15 05:30:45,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1361. [2021-04-15 05:30:45,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.3926470588235293) internal successors, (4614), 1360 states have internal predecessors, (4614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4614 transitions. [2021-04-15 05:30:45,915 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4614 transitions. Word has length 26 [2021-04-15 05:30:45,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:45,915 INFO L480 AbstractCegarLoop]: Abstraction has 1361 states and 4614 transitions. [2021-04-15 05:30:45,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:45,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4614 transitions. [2021-04-15 05:30:45,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:45,918 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:45,918 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:46,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-04-15 05:30:46,119 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:46,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:46,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 22 times [2021-04-15 05:30:46,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:46,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284682030] [2021-04-15 05:30:46,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:46,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284682030] [2021-04-15 05:30:46,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844414277] [2021-04-15 05:30:46,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:46,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:30:46,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:46,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:30:46,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:46,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:46,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:30:46,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 05:30:46,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:30:46,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:46,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:46,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-04-15 05:30:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:46,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:46,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-04-15 05:30:46,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852724683] [2021-04-15 05:30:46,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:30:46,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:46,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:30:46,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:30:46,704 INFO L87 Difference]: Start difference. First operand 1361 states and 4614 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:46,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:46,999 INFO L93 Difference]: Finished difference Result 1474 states and 4920 transitions. [2021-04-15 05:30:46,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 05:30:46,999 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:47,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:47,002 INFO L225 Difference]: With dead ends: 1474 [2021-04-15 05:30:47,002 INFO L226 Difference]: Without dead ends: 1459 [2021-04-15 05:30:47,002 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 474.8ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:30:47,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-04-15 05:30:47,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1367. [2021-04-15 05:30:47,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.394582723279649) internal successors, (4637), 1366 states have internal predecessors, (4637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:47,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4637 transitions. [2021-04-15 05:30:47,021 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4637 transitions. Word has length 26 [2021-04-15 05:30:47,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:47,021 INFO L480 AbstractCegarLoop]: Abstraction has 1367 states and 4637 transitions. [2021-04-15 05:30:47,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:47,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4637 transitions. [2021-04-15 05:30:47,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:47,023 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:47,023 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:47,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:47,226 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:47,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:47,226 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 23 times [2021-04-15 05:30:47,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:47,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811475042] [2021-04-15 05:30:47,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:47,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811475042] [2021-04-15 05:30:47,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183064984] [2021-04-15 05:30:47,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:30:47,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:30:47,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:47,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:30:47,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:47,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:47,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:47,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-04-15 05:30:47,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:30:47,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:47,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:47,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2021-04-15 05:30:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:47,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:47,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:30:47,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512776490] [2021-04-15 05:30:47,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:30:47,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:47,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:30:47,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:30:47,842 INFO L87 Difference]: Start difference. First operand 1367 states and 4637 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:48,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:48,624 INFO L93 Difference]: Finished difference Result 1826 states and 6031 transitions. [2021-04-15 05:30:48,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:30:48,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:48,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:48,629 INFO L225 Difference]: With dead ends: 1826 [2021-04-15 05:30:48,629 INFO L226 Difference]: Without dead ends: 1801 [2021-04-15 05:30:48,630 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 863.3ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:30:48,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2021-04-15 05:30:48,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 1374. [2021-04-15 05:30:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.3991260014566644) internal successors, (4667), 1373 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:48,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4667 transitions. [2021-04-15 05:30:48,658 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4667 transitions. Word has length 26 [2021-04-15 05:30:48,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:48,658 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 4667 transitions. [2021-04-15 05:30:48,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:48,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4667 transitions. [2021-04-15 05:30:48,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:48,663 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:48,663 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:48,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-04-15 05:30:48,881 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:48,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:48,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 24 times [2021-04-15 05:30:48,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:48,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245729745] [2021-04-15 05:30:48,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:49,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245729745] [2021-04-15 05:30:49,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318638365] [2021-04-15 05:30:49,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:49,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:30:49,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:49,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:30:49,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:49,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:49,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:49,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:49,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2021-04-15 05:30:49,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:30:49,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:49,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:49,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-04-15 05:30:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:49,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:49,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-04-15 05:30:49,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604028828] [2021-04-15 05:30:49,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:30:49,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:49,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:30:49,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:30:49,409 INFO L87 Difference]: Start difference. First operand 1374 states and 4667 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:50,293 INFO L93 Difference]: Finished difference Result 1851 states and 6138 transitions. [2021-04-15 05:30:50,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:30:50,294 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:50,296 INFO L225 Difference]: With dead ends: 1851 [2021-04-15 05:30:50,297 INFO L226 Difference]: Without dead ends: 1832 [2021-04-15 05:30:50,297 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 874.4ms TimeCoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 05:30:50,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-04-15 05:30:50,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1386. [2021-04-15 05:30:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.4021660649819494) internal successors, (4712), 1385 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:50,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4712 transitions. [2021-04-15 05:30:50,326 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4712 transitions. Word has length 26 [2021-04-15 05:30:50,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:50,326 INFO L480 AbstractCegarLoop]: Abstraction has 1386 states and 4712 transitions. [2021-04-15 05:30:50,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:50,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4712 transitions. [2021-04-15 05:30:50,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:50,329 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:50,329 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:50,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-04-15 05:30:50,553 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:50,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:50,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 25 times [2021-04-15 05:30:50,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:50,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932431165] [2021-04-15 05:30:50,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:50,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932431165] [2021-04-15 05:30:50,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641162272] [2021-04-15 05:30:50,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:50,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:30:50,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:50,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:50,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:50,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-04-15 05:30:50,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:30:50,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:50,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:50,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-04-15 05:30:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:51,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:51,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-04-15 05:30:51,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295700115] [2021-04-15 05:30:51,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:30:51,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:51,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:30:51,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:30:51,052 INFO L87 Difference]: Start difference. First operand 1386 states and 4712 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:51,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:51,589 INFO L93 Difference]: Finished difference Result 1888 states and 6257 transitions. [2021-04-15 05:30:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 05:30:51,590 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:51,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:51,593 INFO L225 Difference]: With dead ends: 1888 [2021-04-15 05:30:51,593 INFO L226 Difference]: Without dead ends: 1863 [2021-04-15 05:30:51,594 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 591.4ms TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:30:51,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-04-15 05:30:51,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1386. [2021-04-15 05:30:51,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.4021660649819494) internal successors, (4712), 1385 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:51,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4712 transitions. [2021-04-15 05:30:51,612 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4712 transitions. Word has length 26 [2021-04-15 05:30:51,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:51,613 INFO L480 AbstractCegarLoop]: Abstraction has 1386 states and 4712 transitions. [2021-04-15 05:30:51,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:51,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4712 transitions. [2021-04-15 05:30:51,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:51,614 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:51,615 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:51,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-04-15 05:30:51,815 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:51,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:51,816 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-04-15 05:30:51,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:51,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027145423] [2021-04-15 05:30:51,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:52,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027145423] [2021-04-15 05:30:52,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187878850] [2021-04-15 05:30:52,228 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:52,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:30:52,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:52,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:30:52,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:52,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:30:52,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:52,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:30:52,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-04-15 05:30:52,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:30:52,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:52,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:52,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-04-15 05:30:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:52,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:52,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-04-15 05:30:52,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264967078] [2021-04-15 05:30:52,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:30:52,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:52,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:30:52,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:30:52,498 INFO L87 Difference]: Start difference. First operand 1386 states and 4712 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) [2021-04-15 05:30:53,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:53,750 INFO L93 Difference]: Finished difference Result 1823 states and 6011 transitions. [2021-04-15 05:30:53,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:30:53,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:53,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:53,754 INFO L225 Difference]: With dead ends: 1823 [2021-04-15 05:30:53,754 INFO L226 Difference]: Without dead ends: 1797 [2021-04-15 05:30:53,754 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1438.0ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:30:53,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2021-04-15 05:30:53,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1398. [2021-04-15 05:30:53,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.397279885468862) internal successors, (4746), 1397 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:53,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4746 transitions. [2021-04-15 05:30:53,773 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4746 transitions. Word has length 26 [2021-04-15 05:30:53,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:53,773 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 4746 transitions. [2021-04-15 05:30:53,773 INFO L481 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) [2021-04-15 05:30:53,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4746 transitions. [2021-04-15 05:30:53,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:53,775 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:53,775 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:53,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:53,976 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:53,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:53,976 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-04-15 05:30:53,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:53,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375767571] [2021-04-15 05:30:53,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:54,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375767571] [2021-04-15 05:30:54,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180563204] [2021-04-15 05:30:54,303 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:54,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:30:54,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:54,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:30:54,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:54,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:30:54,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-04-15 05:30:54,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:30:54,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:54,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:54,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-04-15 05:30:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:54,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:54,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-04-15 05:30:54,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545384710] [2021-04-15 05:30:54,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:30:54,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:54,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:30:54,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:30:54,497 INFO L87 Difference]: Start difference. First operand 1398 states and 4746 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:55,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:55,746 INFO L93 Difference]: Finished difference Result 1968 states and 6512 transitions. [2021-04-15 05:30:55,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:30:55,746 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:55,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:55,750 INFO L225 Difference]: With dead ends: 1968 [2021-04-15 05:30:55,750 INFO L226 Difference]: Without dead ends: 1953 [2021-04-15 05:30:55,750 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1189.1ms TimeCoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 05:30:55,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-04-15 05:30:55,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1398. [2021-04-15 05:30:55,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.397279885468862) internal successors, (4746), 1397 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:55,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4746 transitions. [2021-04-15 05:30:55,770 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4746 transitions. Word has length 26 [2021-04-15 05:30:55,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:55,770 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 4746 transitions. [2021-04-15 05:30:55,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:55,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4746 transitions. [2021-04-15 05:30:55,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:55,772 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:55,772 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:55,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-04-15 05:30:55,973 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:55,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:55,973 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 26 times [2021-04-15 05:30:55,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:55,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874912040] [2021-04-15 05:30:55,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:56,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874912040] [2021-04-15 05:30:56,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618875454] [2021-04-15 05:30:56,269 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:56,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:30:56,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:56,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:30:56,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:56,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:56,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:56,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-04-15 05:30:56,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:30:56,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:56,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:56,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-04-15 05:30:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:56,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:56,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-04-15 05:30:56,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207419634] [2021-04-15 05:30:56,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:30:56,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:56,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:30:56,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:30:56,544 INFO L87 Difference]: Start difference. First operand 1398 states and 4746 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:57,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:30:57,912 INFO L93 Difference]: Finished difference Result 2014 states and 6565 transitions. [2021-04-15 05:30:57,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:30:57,912 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:30:57,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:30:57,915 INFO L225 Difference]: With dead ends: 2014 [2021-04-15 05:30:57,915 INFO L226 Difference]: Without dead ends: 1995 [2021-04-15 05:30:57,915 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1246.8ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:30:57,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2021-04-15 05:30:57,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1407. [2021-04-15 05:30:57,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1406 states have (on average 3.3975817923186344) internal successors, (4777), 1406 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 4777 transitions. [2021-04-15 05:30:57,935 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 4777 transitions. Word has length 26 [2021-04-15 05:30:57,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:30:57,935 INFO L480 AbstractCegarLoop]: Abstraction has 1407 states and 4777 transitions. [2021-04-15 05:30:57,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:30:57,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 4777 transitions. [2021-04-15 05:30:57,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:30:57,937 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:30:57,937 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:30:58,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:58,138 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:30:58,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:30:58,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-04-15 05:30:58,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:30:58,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605494146] [2021-04-15 05:30:58,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:30:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:30:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:58,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605494146] [2021-04-15 05:30:58,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745861197] [2021-04-15 05:30:58,482 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:30:58,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:30:58,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:30:58,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:30:58,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:30:58,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:58,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:30:58,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:30:58,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:30:58,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-04-15 05:30:58,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:30:58,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:30:58,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:30:58,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-04-15 05:30:58,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:30:58,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:30:58,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-04-15 05:30:58,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482998332] [2021-04-15 05:30:58,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:30:58,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:30:58,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:30:58,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:30:58,680 INFO L87 Difference]: Start difference. First operand 1407 states and 4777 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:00,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:00,282 INFO L93 Difference]: Finished difference Result 2051 states and 6623 transitions. [2021-04-15 05:31:00,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 05:31:00,283 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:00,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:00,286 INFO L225 Difference]: With dead ends: 2051 [2021-04-15 05:31:00,286 INFO L226 Difference]: Without dead ends: 2029 [2021-04-15 05:31:00,287 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1484.8ms TimeCoverageRelationStatistics Valid=354, Invalid=1452, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 05:31:00,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-04-15 05:31:00,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1414. [2021-04-15 05:31:00,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1413 states have (on average 3.3984430290162773) internal successors, (4802), 1413 states have internal predecessors, (4802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 4802 transitions. [2021-04-15 05:31:00,306 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 4802 transitions. Word has length 26 [2021-04-15 05:31:00,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:00,307 INFO L480 AbstractCegarLoop]: Abstraction has 1414 states and 4802 transitions. [2021-04-15 05:31:00,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:00,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 4802 transitions. [2021-04-15 05:31:00,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:00,308 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:00,308 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:00,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-04-15 05:31:00,509 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:00,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:00,509 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-04-15 05:31:00,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:00,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667101441] [2021-04-15 05:31:00,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:00,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667101441] [2021-04-15 05:31:00,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29937687] [2021-04-15 05:31:00,767 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:00,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:31:00,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:00,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:31:00,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:01,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:01,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 59 [2021-04-15 05:31:01,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:31:01,464 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 67 [2021-04-15 05:31:01,465 INFO L628 ElimStorePlain]: treesize reduction 196, result has 42.5 percent of original size [2021-04-15 05:31:01,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:01,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:530 [2021-04-15 05:31:01,840 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2021-04-15 05:31:02,030 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-04-15 05:31:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:02,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:02,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-04-15 05:31:02,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985207162] [2021-04-15 05:31:02,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 05:31:02,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:02,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 05:31:02,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:31:02,062 INFO L87 Difference]: Start difference. First operand 1414 states and 4802 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:05,057 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-04-15 05:31:05,366 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2021-04-15 05:31:05,566 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-04-15 05:31:05,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:05,638 INFO L93 Difference]: Finished difference Result 2512 states and 8095 transitions. [2021-04-15 05:31:05,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 05:31:05,639 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:05,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:05,643 INFO L225 Difference]: With dead ends: 2512 [2021-04-15 05:31:05,643 INFO L226 Difference]: Without dead ends: 2497 [2021-04-15 05:31:05,644 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 3391.3ms TimeCoverageRelationStatistics Valid=461, Invalid=2619, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 05:31:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-04-15 05:31:05,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1424. [2021-04-15 05:31:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 3.399156711173577) internal successors, (4837), 1423 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 4837 transitions. [2021-04-15 05:31:05,668 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 4837 transitions. Word has length 26 [2021-04-15 05:31:05,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:05,669 INFO L480 AbstractCegarLoop]: Abstraction has 1424 states and 4837 transitions. [2021-04-15 05:31:05,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 4837 transitions. [2021-04-15 05:31:05,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:05,671 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:05,671 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:05,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:05,871 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:05,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:05,872 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-04-15 05:31:05,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:05,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328216347] [2021-04-15 05:31:05,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:06,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328216347] [2021-04-15 05:31:06,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609567340] [2021-04-15 05:31:06,126 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:06,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:31:06,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:06,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:31:06,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:06,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:06,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:06,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:31:06,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:31:06,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-04-15 05:31:06,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:31:06,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:06,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:06,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-04-15 05:31:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:06,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:06,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-04-15 05:31:06,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587561657] [2021-04-15 05:31:06,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:31:06,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:06,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:31:06,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:31:06,332 INFO L87 Difference]: Start difference. First operand 1424 states and 4837 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:08,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:08,276 INFO L93 Difference]: Finished difference Result 3025 states and 9657 transitions. [2021-04-15 05:31:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 05:31:08,276 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:08,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:08,281 INFO L225 Difference]: With dead ends: 3025 [2021-04-15 05:31:08,281 INFO L226 Difference]: Without dead ends: 2989 [2021-04-15 05:31:08,282 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1642.6ms TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:31:08,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2021-04-15 05:31:08,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 1557. [2021-04-15 05:31:08,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 3.417095115681234) internal successors, (5317), 1556 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:08,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5317 transitions. [2021-04-15 05:31:08,322 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5317 transitions. Word has length 26 [2021-04-15 05:31:08,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:08,323 INFO L480 AbstractCegarLoop]: Abstraction has 1557 states and 5317 transitions. [2021-04-15 05:31:08,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:08,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5317 transitions. [2021-04-15 05:31:08,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:08,325 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:08,325 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:08,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-04-15 05:31:08,525 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:08,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:08,526 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-04-15 05:31:08,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:08,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660958593] [2021-04-15 05:31:08,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:08,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660958593] [2021-04-15 05:31:08,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077524767] [2021-04-15 05:31:08,841 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:08,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:31:08,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:08,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:31:08,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:08,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:08,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:09,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:09,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-04-15 05:31:09,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:31:09,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:09,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:09,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-04-15 05:31:09,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:09,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:09,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-04-15 05:31:09,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462539691] [2021-04-15 05:31:09,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:31:09,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:09,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:31:09,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:31:09,095 INFO L87 Difference]: Start difference. First operand 1557 states and 5317 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:11,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:11,490 INFO L93 Difference]: Finished difference Result 3407 states and 10755 transitions. [2021-04-15 05:31:11,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 05:31:11,491 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:11,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:11,497 INFO L225 Difference]: With dead ends: 3407 [2021-04-15 05:31:11,497 INFO L226 Difference]: Without dead ends: 3350 [2021-04-15 05:31:11,498 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 2196.9ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:31:11,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2021-04-15 05:31:11,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 1580. [2021-04-15 05:31:11,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.4198860037998733) internal successors, (5400), 1579 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:11,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5400 transitions. [2021-04-15 05:31:11,528 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5400 transitions. Word has length 26 [2021-04-15 05:31:11,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:11,528 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 5400 transitions. [2021-04-15 05:31:11,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5400 transitions. [2021-04-15 05:31:11,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:11,531 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:11,531 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:11,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:11,731 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:11,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:11,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1512099618, now seen corresponding path program 27 times [2021-04-15 05:31:11,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:11,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079750511] [2021-04-15 05:31:11,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:11,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079750511] [2021-04-15 05:31:11,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96391079] [2021-04-15 05:31:11,993 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:12,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:31:12,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:12,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:31:12,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:12,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:12,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-04-15 05:31:12,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:31:12,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:12,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:31:12,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:182 [2021-04-15 05:31:12,504 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-04-15 05:31:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:12,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:12,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-04-15 05:31:12,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333713238] [2021-04-15 05:31:12,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:31:12,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:12,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:31:12,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:31:12,548 INFO L87 Difference]: Start difference. First operand 1580 states and 5400 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:14,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:14,752 INFO L93 Difference]: Finished difference Result 2188 states and 7228 transitions. [2021-04-15 05:31:14,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 05:31:14,752 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:14,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:14,756 INFO L225 Difference]: With dead ends: 2188 [2021-04-15 05:31:14,756 INFO L226 Difference]: Without dead ends: 2158 [2021-04-15 05:31:14,757 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1970.9ms TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 05:31:14,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-04-15 05:31:14,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1591. [2021-04-15 05:31:14,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.419496855345912) internal successors, (5437), 1590 states have internal predecessors, (5437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:14,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5437 transitions. [2021-04-15 05:31:14,779 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5437 transitions. Word has length 26 [2021-04-15 05:31:14,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:14,779 INFO L480 AbstractCegarLoop]: Abstraction has 1591 states and 5437 transitions. [2021-04-15 05:31:14,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:14,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5437 transitions. [2021-04-15 05:31:14,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:14,782 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:14,782 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:14,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-04-15 05:31:14,982 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:14,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:14,983 INFO L82 PathProgramCache]: Analyzing trace with hash -105433162, now seen corresponding path program 28 times [2021-04-15 05:31:14,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:14,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105555881] [2021-04-15 05:31:14,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:15,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105555881] [2021-04-15 05:31:15,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846415512] [2021-04-15 05:31:15,208 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:31:15,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:31:15,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:15,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:31:15,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:15,417 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-04-15 05:31:15,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-04-15 05:31:15,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:31:15,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:15,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:15,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:22 [2021-04-15 05:31:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:15,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:15,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-04-15 05:31:15,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294492347] [2021-04-15 05:31:15,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:31:15,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:15,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:31:15,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:31:15,483 INFO L87 Difference]: Start difference. First operand 1591 states and 5437 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:16,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:16,994 INFO L93 Difference]: Finished difference Result 2267 states and 7551 transitions. [2021-04-15 05:31:16,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 05:31:16,995 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:16,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:16,999 INFO L225 Difference]: With dead ends: 2267 [2021-04-15 05:31:16,999 INFO L226 Difference]: Without dead ends: 2248 [2021-04-15 05:31:16,999 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1238.7ms TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 05:31:17,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-04-15 05:31:17,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1594. [2021-04-15 05:31:17,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 3.418706842435656) internal successors, (5446), 1593 states have internal predecessors, (5446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:17,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 5446 transitions. [2021-04-15 05:31:17,023 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 5446 transitions. Word has length 26 [2021-04-15 05:31:17,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:17,023 INFO L480 AbstractCegarLoop]: Abstraction has 1594 states and 5446 transitions. [2021-04-15 05:31:17,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:17,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 5446 transitions. [2021-04-15 05:31:17,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:17,025 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:17,025 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:17,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:17,226 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:17,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:17,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 29 times [2021-04-15 05:31:17,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:17,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341895265] [2021-04-15 05:31:17,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:17,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341895265] [2021-04-15 05:31:17,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578060076] [2021-04-15 05:31:17,445 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:17,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:31:17,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:17,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:31:17,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:17,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:17,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:17,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-04-15 05:31:17,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:31:17,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:17,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:17,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-04-15 05:31:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:17,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:17,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-04-15 05:31:17,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878018756] [2021-04-15 05:31:17,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:31:17,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:17,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:31:17,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:31:17,681 INFO L87 Difference]: Start difference. First operand 1594 states and 5446 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:18,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:18,948 INFO L93 Difference]: Finished difference Result 2170 states and 7222 transitions. [2021-04-15 05:31:18,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:31:18,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:18,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:18,952 INFO L225 Difference]: With dead ends: 2170 [2021-04-15 05:31:18,952 INFO L226 Difference]: Without dead ends: 2145 [2021-04-15 05:31:18,953 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1015.8ms TimeCoverageRelationStatistics Valid=263, Invalid=1219, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:31:18,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-04-15 05:31:18,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1588. [2021-04-15 05:31:18,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 3.420289855072464) internal successors, (5428), 1587 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:18,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 5428 transitions. [2021-04-15 05:31:18,975 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 5428 transitions. Word has length 26 [2021-04-15 05:31:18,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:18,975 INFO L480 AbstractCegarLoop]: Abstraction has 1588 states and 5428 transitions. [2021-04-15 05:31:18,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 5428 transitions. [2021-04-15 05:31:18,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:18,977 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:18,977 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:19,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-04-15 05:31:19,178 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:19,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:19,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 48 times [2021-04-15 05:31:19,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:19,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925672255] [2021-04-15 05:31:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:19,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925672255] [2021-04-15 05:31:19,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398691803] [2021-04-15 05:31:19,564 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:19,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:31:19,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:19,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:31:19,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:19,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:19,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:31:19,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:31:19,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-04-15 05:31:19,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:31:19,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:19,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:19,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-04-15 05:31:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:19,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:19,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-04-15 05:31:19,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195590379] [2021-04-15 05:31:19,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:31:19,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:19,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:31:19,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:31:19,783 INFO L87 Difference]: Start difference. First operand 1588 states and 5428 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:21,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:21,031 INFO L93 Difference]: Finished difference Result 2065 states and 6822 transitions. [2021-04-15 05:31:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:31:21,032 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:21,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:21,036 INFO L225 Difference]: With dead ends: 2065 [2021-04-15 05:31:21,036 INFO L226 Difference]: Without dead ends: 2043 [2021-04-15 05:31:21,036 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1371.7ms TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:31:21,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-04-15 05:31:21,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1580. [2021-04-15 05:31:21,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.4198860037998733) internal successors, (5400), 1579 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:21,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5400 transitions. [2021-04-15 05:31:21,058 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5400 transitions. Word has length 26 [2021-04-15 05:31:21,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:21,058 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 5400 transitions. [2021-04-15 05:31:21,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:21,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5400 transitions. [2021-04-15 05:31:21,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:21,061 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:21,061 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:21,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-04-15 05:31:21,262 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:21,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:21,262 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-04-15 05:31:21,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:21,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537745891] [2021-04-15 05:31:21,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:21,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537745891] [2021-04-15 05:31:21,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380533273] [2021-04-15 05:31:21,652 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:21,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:31:21,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:21,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:21,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:31:21,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:31:21,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-04-15 05:31:21,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:31:21,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:21,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:21,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-04-15 05:31:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:21,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:21,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-04-15 05:31:21,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670397713] [2021-04-15 05:31:21,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:31:21,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:21,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:31:21,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:31:21,883 INFO L87 Difference]: Start difference. First operand 1580 states and 5400 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:23,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:23,433 INFO L93 Difference]: Finished difference Result 2212 states and 7331 transitions. [2021-04-15 05:31:23,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 05:31:23,433 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:23,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:23,437 INFO L225 Difference]: With dead ends: 2212 [2021-04-15 05:31:23,437 INFO L226 Difference]: Without dead ends: 2197 [2021-04-15 05:31:23,438 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1529.7ms TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 05:31:23,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2021-04-15 05:31:23,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 1580. [2021-04-15 05:31:23,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.4198860037998733) internal successors, (5400), 1579 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:23,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5400 transitions. [2021-04-15 05:31:23,459 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5400 transitions. Word has length 26 [2021-04-15 05:31:23,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:23,459 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 5400 transitions. [2021-04-15 05:31:23,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:23,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5400 transitions. [2021-04-15 05:31:23,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:23,461 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:23,461 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:23,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:23,663 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:23,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:23,663 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 50 times [2021-04-15 05:31:23,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:23,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006565691] [2021-04-15 05:31:23,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:23,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006565691] [2021-04-15 05:31:23,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987536117] [2021-04-15 05:31:23,965 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:23,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:31:23,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:23,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:31:23,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:24,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:24,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:24,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 51 [2021-04-15 05:31:24,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:31:24,443 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2021-04-15 05:31:24,444 INFO L628 ElimStorePlain]: treesize reduction 79, result has 51.8 percent of original size [2021-04-15 05:31:24,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:24,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:293 [2021-04-15 05:31:24,606 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2021-04-15 05:31:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:24,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:24,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-04-15 05:31:24,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852506815] [2021-04-15 05:31:24,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:31:24,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:24,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:31:24,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:31:24,722 INFO L87 Difference]: Start difference. First operand 1580 states and 5400 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) [2021-04-15 05:31:25,717 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-04-15 05:31:26,107 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-04-15 05:31:27,234 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-04-15 05:31:27,531 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-04-15 05:31:29,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:29,313 INFO L93 Difference]: Finished difference Result 2788 states and 8924 transitions. [2021-04-15 05:31:29,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 05:31:29,313 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:29,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:29,318 INFO L225 Difference]: With dead ends: 2788 [2021-04-15 05:31:29,318 INFO L226 Difference]: Without dead ends: 2747 [2021-04-15 05:31:29,318 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 3945.8ms TimeCoverageRelationStatistics Valid=600, Invalid=3432, Unknown=0, NotChecked=0, Total=4032 [2021-04-15 05:31:29,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2021-04-15 05:31:29,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 1590. [2021-04-15 05:31:29,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 3.42039018250472) internal successors, (5435), 1589 states have internal predecessors, (5435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:29,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 5435 transitions. [2021-04-15 05:31:29,343 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 5435 transitions. Word has length 26 [2021-04-15 05:31:29,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:29,344 INFO L480 AbstractCegarLoop]: Abstraction has 1590 states and 5435 transitions. [2021-04-15 05:31:29,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) [2021-04-15 05:31:29,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 5435 transitions. [2021-04-15 05:31:29,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:29,346 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:29,346 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:29,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:29,547 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:29,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:29,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1044384706, now seen corresponding path program 51 times [2021-04-15 05:31:29,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:29,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542398036] [2021-04-15 05:31:29,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:29,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542398036] [2021-04-15 05:31:29,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502748961] [2021-04-15 05:31:29,879 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:29,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:31:29,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:29,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:31:29,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:30,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:30,108 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-04-15 05:31:30,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 98 treesize of output 94 [2021-04-15 05:31:30,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:31:30,165 INFO L628 ElimStorePlain]: treesize reduction 84, result has 27.6 percent of original size [2021-04-15 05:31:30,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:30,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:106, output treesize:46 [2021-04-15 05:31:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:30,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:30,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-04-15 05:31:30,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382839696] [2021-04-15 05:31:30,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:31:30,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:30,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:31:30,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:31:30,287 INFO L87 Difference]: Start difference. First operand 1590 states and 5435 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:31,226 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-04-15 05:31:33,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:33,336 INFO L93 Difference]: Finished difference Result 2573 states and 8472 transitions. [2021-04-15 05:31:33,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 05:31:33,336 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:33,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:33,341 INFO L225 Difference]: With dead ends: 2573 [2021-04-15 05:31:33,341 INFO L226 Difference]: Without dead ends: 2532 [2021-04-15 05:31:33,341 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 2762.5ms TimeCoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 05:31:33,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-04-15 05:31:33,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1583. [2021-04-15 05:31:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.4190897597977243) internal successors, (5409), 1582 states have internal predecessors, (5409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:33,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5409 transitions. [2021-04-15 05:31:33,366 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5409 transitions. Word has length 26 [2021-04-15 05:31:33,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:33,366 INFO L480 AbstractCegarLoop]: Abstraction has 1583 states and 5409 transitions. [2021-04-15 05:31:33,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:33,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5409 transitions. [2021-04-15 05:31:33,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:33,368 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:33,369 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:33,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-04-15 05:31:33,572 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:33,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:33,572 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 52 times [2021-04-15 05:31:33,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:33,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439447590] [2021-04-15 05:31:33,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:33,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439447590] [2021-04-15 05:31:33,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669633714] [2021-04-15 05:31:33,975 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:34,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:31:34,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:34,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:31:34,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:34,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:34,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:34,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:34,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-04-15 05:31:34,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:31:34,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:34,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:34,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-04-15 05:31:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:34,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:34,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-04-15 05:31:34,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090605784] [2021-04-15 05:31:34,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:31:34,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:34,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:31:34,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:31:34,290 INFO L87 Difference]: Start difference. First operand 1583 states and 5409 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:36,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:36,170 INFO L93 Difference]: Finished difference Result 2559 states and 8411 transitions. [2021-04-15 05:31:36,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 05:31:36,170 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:36,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:36,175 INFO L225 Difference]: With dead ends: 2559 [2021-04-15 05:31:36,175 INFO L226 Difference]: Without dead ends: 2514 [2021-04-15 05:31:36,175 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1732.2ms TimeCoverageRelationStatistics Valid=345, Invalid=1547, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 05:31:36,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-04-15 05:31:36,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 1594. [2021-04-15 05:31:36,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 3.4199623352165727) internal successors, (5448), 1593 states have internal predecessors, (5448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:36,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 5448 transitions. [2021-04-15 05:31:36,199 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 5448 transitions. Word has length 26 [2021-04-15 05:31:36,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:36,199 INFO L480 AbstractCegarLoop]: Abstraction has 1594 states and 5448 transitions. [2021-04-15 05:31:36,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:36,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 5448 transitions. [2021-04-15 05:31:36,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:36,202 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:36,202 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:36,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-04-15 05:31:36,402 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:36,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:36,403 INFO L82 PathProgramCache]: Analyzing trace with hash -54538374, now seen corresponding path program 53 times [2021-04-15 05:31:36,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:36,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872407559] [2021-04-15 05:31:36,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:36,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872407559] [2021-04-15 05:31:36,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922681969] [2021-04-15 05:31:36,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:36,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:31:36,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:36,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:31:36,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:36,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:36,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:36,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:36,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:36,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-04-15 05:31:36,852 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-04-15 05:31:36,875 INFO L628 ElimStorePlain]: treesize reduction 24, result has 42.9 percent of original size [2021-04-15 05:31:36,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:36,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:18 [2021-04-15 05:31:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:36,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:36,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-04-15 05:31:36,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139648969] [2021-04-15 05:31:36,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:31:36,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:36,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:31:36,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:31:36,946 INFO L87 Difference]: Start difference. First operand 1594 states and 5448 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:40,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:40,980 INFO L93 Difference]: Finished difference Result 3314 states and 10467 transitions. [2021-04-15 05:31:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-04-15 05:31:40,980 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:40,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:40,987 INFO L225 Difference]: With dead ends: 3314 [2021-04-15 05:31:40,987 INFO L226 Difference]: Without dead ends: 3267 [2021-04-15 05:31:40,987 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 3314.1ms TimeCoverageRelationStatistics Valid=884, Invalid=4372, Unknown=0, NotChecked=0, Total=5256 [2021-04-15 05:31:40,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2021-04-15 05:31:41,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 1619. [2021-04-15 05:31:41,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.4283065512978985) internal successors, (5547), 1618 states have internal predecessors, (5547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 5547 transitions. [2021-04-15 05:31:41,032 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 5547 transitions. Word has length 26 [2021-04-15 05:31:41,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:41,032 INFO L480 AbstractCegarLoop]: Abstraction has 1619 states and 5547 transitions. [2021-04-15 05:31:41,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:41,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 5547 transitions. [2021-04-15 05:31:41,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:41,035 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:41,035 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:41,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-04-15 05:31:41,235 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:41,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:41,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1644457752, now seen corresponding path program 30 times [2021-04-15 05:31:41,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:41,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804230266] [2021-04-15 05:31:41,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:41,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804230266] [2021-04-15 05:31:41,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730536646] [2021-04-15 05:31:41,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:41,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:31:41,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:41,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:31:41,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:41,714 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-04-15 05:31:41,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 48 [2021-04-15 05:31:41,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:31:41,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:41,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:41,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:17 [2021-04-15 05:31:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:41,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:41,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:31:41,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678789508] [2021-04-15 05:31:41,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:31:41,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:41,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:31:41,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:31:41,783 INFO L87 Difference]: Start difference. First operand 1619 states and 5547 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:43,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:43,539 INFO L93 Difference]: Finished difference Result 2129 states and 7041 transitions. [2021-04-15 05:31:43,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:31:43,540 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:43,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:43,544 INFO L225 Difference]: With dead ends: 2129 [2021-04-15 05:31:43,544 INFO L226 Difference]: Without dead ends: 2114 [2021-04-15 05:31:43,544 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1216.5ms TimeCoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 05:31:43,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-04-15 05:31:43,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1607. [2021-04-15 05:31:43,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 3.430884184308842) internal successors, (5510), 1606 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5510 transitions. [2021-04-15 05:31:43,568 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5510 transitions. Word has length 26 [2021-04-15 05:31:43,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:43,568 INFO L480 AbstractCegarLoop]: Abstraction has 1607 states and 5510 transitions. [2021-04-15 05:31:43,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:43,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5510 transitions. [2021-04-15 05:31:43,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:43,570 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:43,570 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:43,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-04-15 05:31:43,771 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:43,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:43,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1033146674, now seen corresponding path program 31 times [2021-04-15 05:31:43,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:43,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465895212] [2021-04-15 05:31:43,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:43,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465895212] [2021-04-15 05:31:43,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539499650] [2021-04-15 05:31:43,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:43,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:31:43,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:44,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:44,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:31:44,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 05:31:44,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:31:44,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:44,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:44,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-04-15 05:31:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:44,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:44,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 05:31:44,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916714259] [2021-04-15 05:31:44,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:31:44,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:44,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:31:44,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:31:44,168 INFO L87 Difference]: Start difference. First operand 1607 states and 5510 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:44,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:44,519 INFO L93 Difference]: Finished difference Result 1918 states and 6461 transitions. [2021-04-15 05:31:44,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 05:31:44,520 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:44,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:44,524 INFO L225 Difference]: With dead ends: 1918 [2021-04-15 05:31:44,524 INFO L226 Difference]: Without dead ends: 1903 [2021-04-15 05:31:44,524 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 330.3ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:31:44,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2021-04-15 05:31:44,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1601. [2021-04-15 05:31:44,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 3.430625) internal successors, (5489), 1600 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:44,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 5489 transitions. [2021-04-15 05:31:44,547 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 5489 transitions. Word has length 26 [2021-04-15 05:31:44,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:44,547 INFO L480 AbstractCegarLoop]: Abstraction has 1601 states and 5489 transitions. [2021-04-15 05:31:44,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:44,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 5489 transitions. [2021-04-15 05:31:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:44,550 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:44,550 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:44,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-04-15 05:31:44,750 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:44,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:44,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1034369354, now seen corresponding path program 32 times [2021-04-15 05:31:44,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:44,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164070833] [2021-04-15 05:31:44,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:44,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164070833] [2021-04-15 05:31:44,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101243317] [2021-04-15 05:31:44,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:44,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:31:44,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:44,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:31:44,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:45,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:45,152 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-04-15 05:31:45,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 59 [2021-04-15 05:31:45,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:31:45,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:45,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:45,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:32 [2021-04-15 05:31:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:45,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:45,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-04-15 05:31:45,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703618095] [2021-04-15 05:31:45,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:31:45,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:45,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:31:45,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:31:45,259 INFO L87 Difference]: Start difference. First operand 1601 states and 5489 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:46,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:46,627 INFO L93 Difference]: Finished difference Result 2777 states and 9028 transitions. [2021-04-15 05:31:46,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:31:46,628 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:46,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:46,635 INFO L225 Difference]: With dead ends: 2777 [2021-04-15 05:31:46,635 INFO L226 Difference]: Without dead ends: 2726 [2021-04-15 05:31:46,635 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1156.2ms TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 05:31:46,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-04-15 05:31:46,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 1631. [2021-04-15 05:31:46,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.4404907975460124) internal successors, (5608), 1630 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:46,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5608 transitions. [2021-04-15 05:31:46,676 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5608 transitions. Word has length 26 [2021-04-15 05:31:46,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:46,676 INFO L480 AbstractCegarLoop]: Abstraction has 1631 states and 5608 transitions. [2021-04-15 05:31:46,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:46,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5608 transitions. [2021-04-15 05:31:46,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:46,679 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:46,679 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:46,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:46,895 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:46,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:46,895 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 33 times [2021-04-15 05:31:46,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:46,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141493565] [2021-04-15 05:31:46,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:46,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:47,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141493565] [2021-04-15 05:31:47,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117012611] [2021-04-15 05:31:47,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:47,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:31:47,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:47,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:31:47,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:47,399 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-04-15 05:31:47,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 41 [2021-04-15 05:31:47,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:31:47,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:47,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:47,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:5 [2021-04-15 05:31:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:47,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:47,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:31:47,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727887203] [2021-04-15 05:31:47,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:31:47,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:47,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:31:47,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:31:47,429 INFO L87 Difference]: Start difference. First operand 1631 states and 5608 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:47,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:47,988 INFO L93 Difference]: Finished difference Result 2060 states and 6895 transitions. [2021-04-15 05:31:47,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:31:47,989 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:47,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:47,992 INFO L225 Difference]: With dead ends: 2060 [2021-04-15 05:31:47,992 INFO L226 Difference]: Without dead ends: 2039 [2021-04-15 05:31:47,993 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 559.1ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:31:47,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-04-15 05:31:48,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 1631. [2021-04-15 05:31:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.4404907975460124) internal successors, (5608), 1630 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:48,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5608 transitions. [2021-04-15 05:31:48,014 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5608 transitions. Word has length 26 [2021-04-15 05:31:48,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:48,014 INFO L480 AbstractCegarLoop]: Abstraction has 1631 states and 5608 transitions. [2021-04-15 05:31:48,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:48,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5608 transitions. [2021-04-15 05:31:48,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:48,016 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:48,016 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:48,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-04-15 05:31:48,224 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:48,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:48,225 INFO L82 PathProgramCache]: Analyzing trace with hash -716780640, now seen corresponding path program 34 times [2021-04-15 05:31:48,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:48,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819716051] [2021-04-15 05:31:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:48,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819716051] [2021-04-15 05:31:48,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062455764] [2021-04-15 05:31:48,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:48,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:31:48,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:48,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:31:48,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:48,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:48,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:31:48,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 05:31:48,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:31:48,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:48,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:48,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-04-15 05:31:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:48,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:48,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 05:31:48,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78139773] [2021-04-15 05:31:48,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:31:48,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:48,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:31:48,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:31:48,657 INFO L87 Difference]: Start difference. First operand 1631 states and 5608 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:49,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:49,025 INFO L93 Difference]: Finished difference Result 1947 states and 6547 transitions. [2021-04-15 05:31:49,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 05:31:49,025 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:49,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:49,028 INFO L225 Difference]: With dead ends: 1947 [2021-04-15 05:31:49,029 INFO L226 Difference]: Without dead ends: 1928 [2021-04-15 05:31:49,029 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 418.3ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:31:49,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-04-15 05:31:49,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1625. [2021-04-15 05:31:49,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.440270935960591) internal successors, (5587), 1624 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5587 transitions. [2021-04-15 05:31:49,048 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5587 transitions. Word has length 26 [2021-04-15 05:31:49,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:49,048 INFO L480 AbstractCegarLoop]: Abstraction has 1625 states and 5587 transitions. [2021-04-15 05:31:49,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:49,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5587 transitions. [2021-04-15 05:31:49,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:49,050 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:49,050 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:49,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:49,251 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:49,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:49,251 INFO L82 PathProgramCache]: Analyzing trace with hash 475685792, now seen corresponding path program 35 times [2021-04-15 05:31:49,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:49,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391668292] [2021-04-15 05:31:49,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:49,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391668292] [2021-04-15 05:31:49,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94003244] [2021-04-15 05:31:49,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:49,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:31:49,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:49,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:31:49,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:49,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:31:49,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:49,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 30 [2021-04-15 05:31:49,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:31:49,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:49,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:49,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:125 [2021-04-15 05:31:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:49,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:49,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-04-15 05:31:49,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995404549] [2021-04-15 05:31:49,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:31:49,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:49,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:31:49,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:31:49,792 INFO L87 Difference]: Start difference. First operand 1625 states and 5587 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:51,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:51,915 INFO L93 Difference]: Finished difference Result 2536 states and 8195 transitions. [2021-04-15 05:31:51,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 05:31:51,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:51,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:51,920 INFO L225 Difference]: With dead ends: 2536 [2021-04-15 05:31:51,920 INFO L226 Difference]: Without dead ends: 2486 [2021-04-15 05:31:51,920 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1704.8ms TimeCoverageRelationStatistics Valid=249, Invalid=1391, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 05:31:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-04-15 05:31:51,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1619. [2021-04-15 05:31:51,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.434487021013597) internal successors, (5557), 1618 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:51,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 5557 transitions. [2021-04-15 05:31:51,945 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 5557 transitions. Word has length 26 [2021-04-15 05:31:51,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:51,945 INFO L480 AbstractCegarLoop]: Abstraction has 1619 states and 5557 transitions. [2021-04-15 05:31:51,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:51,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 5557 transitions. [2021-04-15 05:31:51,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:51,947 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:51,947 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:52,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:52,148 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:52,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:52,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1353247494, now seen corresponding path program 36 times [2021-04-15 05:31:52,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:52,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298360171] [2021-04-15 05:31:52,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:52,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298360171] [2021-04-15 05:31:52,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517555654] [2021-04-15 05:31:52,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:31:52,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:31:52,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:52,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:31:52,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:52,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:52,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:31:52,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 05:31:52,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:31:52,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:52,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:52,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-04-15 05:31:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:52,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:52,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 05:31:52,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30674977] [2021-04-15 05:31:52,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:31:52,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:52,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:31:52,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:31:52,811 INFO L87 Difference]: Start difference. First operand 1619 states and 5557 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:53,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:53,058 INFO L93 Difference]: Finished difference Result 1694 states and 5722 transitions. [2021-04-15 05:31:53,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:31:53,061 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:53,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:53,065 INFO L225 Difference]: With dead ends: 1694 [2021-04-15 05:31:53,065 INFO L226 Difference]: Without dead ends: 1675 [2021-04-15 05:31:53,065 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 522.1ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:31:53,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2021-04-15 05:31:53,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1611. [2021-04-15 05:31:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1610 states have (on average 3.432919254658385) internal successors, (5527), 1610 states have internal predecessors, (5527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:53,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5527 transitions. [2021-04-15 05:31:53,099 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5527 transitions. Word has length 26 [2021-04-15 05:31:53,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:53,099 INFO L480 AbstractCegarLoop]: Abstraction has 1611 states and 5527 transitions. [2021-04-15 05:31:53,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5527 transitions. [2021-04-15 05:31:53,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:53,101 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:53,101 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:53,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:53,302 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:53,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:53,302 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 37 times [2021-04-15 05:31:53,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:53,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758775284] [2021-04-15 05:31:53,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:53,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758775284] [2021-04-15 05:31:53,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450478821] [2021-04-15 05:31:53,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:53,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:31:53,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:53,816 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-04-15 05:31:53,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 49 [2021-04-15 05:31:53,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:31:53,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:53,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:53,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-04-15 05:31:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:53,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:53,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 05:31:53,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779106218] [2021-04-15 05:31:53,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:31:53,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:53,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:31:53,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:31:53,850 INFO L87 Difference]: Start difference. First operand 1611 states and 5527 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:54,135 INFO L93 Difference]: Finished difference Result 1742 states and 5886 transitions. [2021-04-15 05:31:54,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 05:31:54,136 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:54,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:54,139 INFO L225 Difference]: With dead ends: 1742 [2021-04-15 05:31:54,139 INFO L226 Difference]: Without dead ends: 1727 [2021-04-15 05:31:54,139 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 422.9ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:31:54,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2021-04-15 05:31:54,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1599. [2021-04-15 05:31:54,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.4399249061326658) internal successors, (5497), 1598 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:54,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5497 transitions. [2021-04-15 05:31:54,165 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5497 transitions. Word has length 26 [2021-04-15 05:31:54,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:54,165 INFO L480 AbstractCegarLoop]: Abstraction has 1599 states and 5497 transitions. [2021-04-15 05:31:54,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:54,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5497 transitions. [2021-04-15 05:31:54,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:54,169 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:54,169 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:54,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-04-15 05:31:54,391 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:54,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:54,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1929714430, now seen corresponding path program 38 times [2021-04-15 05:31:54,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:54,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723800826] [2021-04-15 05:31:54,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:54,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723800826] [2021-04-15 05:31:54,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595372458] [2021-04-15 05:31:54,577 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:54,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:31:54,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:54,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:31:54,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:54,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:54,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:54,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:54,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2021-04-15 05:31:54,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:31:54,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:54,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:54,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-04-15 05:31:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:54,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:54,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-04-15 05:31:54,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183552465] [2021-04-15 05:31:54,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:31:54,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:54,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:31:54,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:31:54,851 INFO L87 Difference]: Start difference. First operand 1599 states and 5497 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:55,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:55,727 INFO L93 Difference]: Finished difference Result 2325 states and 7667 transitions. [2021-04-15 05:31:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:31:55,728 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:55,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:55,732 INFO L225 Difference]: With dead ends: 2325 [2021-04-15 05:31:55,732 INFO L226 Difference]: Without dead ends: 2279 [2021-04-15 05:31:55,732 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 774.1ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:31:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2021-04-15 05:31:55,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 1606. [2021-04-15 05:31:55,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 3.4386292834890964) internal successors, (5519), 1605 states have internal predecessors, (5519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:55,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 5519 transitions. [2021-04-15 05:31:55,755 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 5519 transitions. Word has length 26 [2021-04-15 05:31:55,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:55,755 INFO L480 AbstractCegarLoop]: Abstraction has 1606 states and 5519 transitions. [2021-04-15 05:31:55,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:55,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 5519 transitions. [2021-04-15 05:31:55,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:55,757 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:55,757 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:55,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-04-15 05:31:55,958 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:55,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:55,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1357140426, now seen corresponding path program 39 times [2021-04-15 05:31:55,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:55,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002175231] [2021-04-15 05:31:55,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:56,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002175231] [2021-04-15 05:31:56,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510135500] [2021-04-15 05:31:56,117 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:56,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:31:56,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:56,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:31:56,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:56,409 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-04-15 05:31:56,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 54 [2021-04-15 05:31:56,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:31:56,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:56,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:31:56,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:67 [2021-04-15 05:31:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:56,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:56,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:31:56,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649398375] [2021-04-15 05:31:56,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:31:56,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:56,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:31:56,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:31:56,566 INFO L87 Difference]: Start difference. First operand 1606 states and 5519 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:57,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:57,426 INFO L93 Difference]: Finished difference Result 2392 states and 7918 transitions. [2021-04-15 05:31:57,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:31:57,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:57,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:57,431 INFO L225 Difference]: With dead ends: 2392 [2021-04-15 05:31:57,431 INFO L226 Difference]: Without dead ends: 2373 [2021-04-15 05:31:57,431 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 905.0ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-04-15 05:31:57,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2021-04-15 05:31:57,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 1609. [2021-04-15 05:31:57,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1608 states have (on average 3.4353233830845773) internal successors, (5524), 1608 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:57,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 5524 transitions. [2021-04-15 05:31:57,455 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 5524 transitions. Word has length 26 [2021-04-15 05:31:57,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:57,455 INFO L480 AbstractCegarLoop]: Abstraction has 1609 states and 5524 transitions. [2021-04-15 05:31:57,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:57,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 5524 transitions. [2021-04-15 05:31:57,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:57,457 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:57,457 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:57,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:57,658 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:57,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:57,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1247883966, now seen corresponding path program 40 times [2021-04-15 05:31:57,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:57,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788938522] [2021-04-15 05:31:57,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:57,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788938522] [2021-04-15 05:31:57,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085748446] [2021-04-15 05:31:57,817 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:57,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:31:57,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:57,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:31:57,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:58,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:31:58,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:58,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-04-15 05:31:58,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:31:58,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:58,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:58,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-04-15 05:31:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:58,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:58,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:31:58,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359638993] [2021-04-15 05:31:58,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:31:58,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:58,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:31:58,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:31:58,085 INFO L87 Difference]: Start difference. First operand 1609 states and 5524 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:58,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:58,568 INFO L93 Difference]: Finished difference Result 2162 states and 7222 transitions. [2021-04-15 05:31:58,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 05:31:58,568 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:58,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:58,572 INFO L225 Difference]: With dead ends: 2162 [2021-04-15 05:31:58,572 INFO L226 Difference]: Without dead ends: 2137 [2021-04-15 05:31:58,572 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 517.0ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:31:58,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-04-15 05:31:58,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1600. [2021-04-15 05:31:58,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.434021263289556) internal successors, (5491), 1599 states have internal predecessors, (5491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5491 transitions. [2021-04-15 05:31:58,593 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5491 transitions. Word has length 26 [2021-04-15 05:31:58,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:58,593 INFO L480 AbstractCegarLoop]: Abstraction has 1600 states and 5491 transitions. [2021-04-15 05:31:58,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:58,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5491 transitions. [2021-04-15 05:31:58,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:58,595 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:58,595 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:31:58,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-04-15 05:31:58,796 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:31:58,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:31:58,796 INFO L82 PathProgramCache]: Analyzing trace with hash -48158490, now seen corresponding path program 41 times [2021-04-15 05:31:58,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:31:58,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282223529] [2021-04-15 05:31:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:31:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:31:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:58,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282223529] [2021-04-15 05:31:58,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807880604] [2021-04-15 05:31:58,951 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:31:58,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:31:58,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:31:58,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:31:58,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:31:59,264 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-04-15 05:31:59,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 49 [2021-04-15 05:31:59,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:31:59,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:31:59,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:31:59,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-04-15 05:31:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:31:59,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:31:59,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:31:59,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871443675] [2021-04-15 05:31:59,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:31:59,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:31:59,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:31:59,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:31:59,298 INFO L87 Difference]: Start difference. First operand 1600 states and 5491 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:59,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:31:59,930 INFO L93 Difference]: Finished difference Result 2058 states and 6891 transitions. [2021-04-15 05:31:59,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:31:59,931 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:31:59,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:31:59,934 INFO L225 Difference]: With dead ends: 2058 [2021-04-15 05:31:59,934 INFO L226 Difference]: Without dead ends: 2043 [2021-04-15 05:31:59,934 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 673.4ms TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-04-15 05:31:59,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-04-15 05:31:59,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1589. [2021-04-15 05:31:59,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1589 states, 1588 states have (on average 3.434508816120907) internal successors, (5454), 1588 states have internal predecessors, (5454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 5454 transitions. [2021-04-15 05:31:59,953 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 5454 transitions. Word has length 26 [2021-04-15 05:31:59,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:31:59,953 INFO L480 AbstractCegarLoop]: Abstraction has 1589 states and 5454 transitions. [2021-04-15 05:31:59,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:31:59,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 5454 transitions. [2021-04-15 05:31:59,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:31:59,955 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:31:59,955 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:00,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:00,156 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:00,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:00,157 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 42 times [2021-04-15 05:32:00,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:00,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030664374] [2021-04-15 05:32:00,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:00,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030664374] [2021-04-15 05:32:00,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106078460] [2021-04-15 05:32:00,310 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:00,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:32:00,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:00,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:32:00,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:00,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:00,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 32 [2021-04-15 05:32:00,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:32:00,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:00,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:00,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:25 [2021-04-15 05:32:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:00,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:00,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:32:00,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108223806] [2021-04-15 05:32:00,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:32:00,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:00,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:32:00,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:32:00,634 INFO L87 Difference]: Start difference. First operand 1589 states and 5454 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:01,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:01,956 INFO L93 Difference]: Finished difference Result 2237 states and 7390 transitions. [2021-04-15 05:32:01,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:32:01,956 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:01,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:01,960 INFO L225 Difference]: With dead ends: 2237 [2021-04-15 05:32:01,960 INFO L226 Difference]: Without dead ends: 2207 [2021-04-15 05:32:01,961 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1020.2ms TimeCoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 05:32:01,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-04-15 05:32:01,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1640. [2021-04-15 05:32:01,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.4283099450884684) internal successors, (5619), 1639 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:01,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5619 transitions. [2021-04-15 05:32:01,989 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5619 transitions. Word has length 26 [2021-04-15 05:32:01,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:01,989 INFO L480 AbstractCegarLoop]: Abstraction has 1640 states and 5619 transitions. [2021-04-15 05:32:01,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:01,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5619 transitions. [2021-04-15 05:32:01,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:01,993 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:01,993 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:02,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:02,215 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:02,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:02,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1930035334, now seen corresponding path program 43 times [2021-04-15 05:32:02,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:02,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328950048] [2021-04-15 05:32:02,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:02,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328950048] [2021-04-15 05:32:02,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789376245] [2021-04-15 05:32:02,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:02,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:32:02,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:02,576 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-04-15 05:32:02,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-04-15 05:32:02,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:32:02,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:02,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:02,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2021-04-15 05:32:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:02,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:02,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:32:02,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726110544] [2021-04-15 05:32:02,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:32:02,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:02,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:32:02,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:32:02,654 INFO L87 Difference]: Start difference. First operand 1640 states and 5619 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:03,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:03,290 INFO L93 Difference]: Finished difference Result 2346 states and 7809 transitions. [2021-04-15 05:32:03,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:32:03,291 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:03,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:03,296 INFO L225 Difference]: With dead ends: 2346 [2021-04-15 05:32:03,296 INFO L226 Difference]: Without dead ends: 2331 [2021-04-15 05:32:03,296 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 582.7ms TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:32:03,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-04-15 05:32:03,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1634. [2021-04-15 05:32:03,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 3.4280465401102265) internal successors, (5598), 1633 states have internal predecessors, (5598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:03,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 5598 transitions. [2021-04-15 05:32:03,321 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 5598 transitions. Word has length 26 [2021-04-15 05:32:03,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:03,321 INFO L480 AbstractCegarLoop]: Abstraction has 1634 states and 5598 transitions. [2021-04-15 05:32:03,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:03,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 5598 transitions. [2021-04-15 05:32:03,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:03,323 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:03,323 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:03,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-04-15 05:32:03,524 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:03,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:03,524 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 44 times [2021-04-15 05:32:03,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:03,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232727367] [2021-04-15 05:32:03,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:03,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232727367] [2021-04-15 05:32:03,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949043084] [2021-04-15 05:32:03,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:32:03,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:32:03,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:03,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:32:03,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:03,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:04,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:04,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-04-15 05:32:04,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:32:04,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:04,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:32:04,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:67 [2021-04-15 05:32:04,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:04,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:04,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:32:04,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330735993] [2021-04-15 05:32:04,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:32:04,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:04,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:32:04,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:32:04,144 INFO L87 Difference]: Start difference. First operand 1634 states and 5598 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:04,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:04,585 INFO L93 Difference]: Finished difference Result 2148 states and 7204 transitions. [2021-04-15 05:32:04,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:32:04,586 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:04,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:04,590 INFO L225 Difference]: With dead ends: 2148 [2021-04-15 05:32:04,590 INFO L226 Difference]: Without dead ends: 2133 [2021-04-15 05:32:04,590 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 621.7ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:32:04,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-04-15 05:32:04,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1637. [2021-04-15 05:32:04,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 3.4315403422982884) internal successors, (5614), 1636 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:04,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 5614 transitions. [2021-04-15 05:32:04,612 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 5614 transitions. Word has length 26 [2021-04-15 05:32:04,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:04,612 INFO L480 AbstractCegarLoop]: Abstraction has 1637 states and 5614 transitions. [2021-04-15 05:32:04,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:04,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 5614 transitions. [2021-04-15 05:32:04,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:04,614 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:04,614 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:04,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-04-15 05:32:04,815 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:04,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:04,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 45 times [2021-04-15 05:32:04,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:04,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168710332] [2021-04-15 05:32:04,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:04,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168710332] [2021-04-15 05:32:04,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83854969] [2021-04-15 05:32:04,954 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:04,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:32:04,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:04,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:32:04,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:05,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:05,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:05,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-04-15 05:32:05,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:32:05,204 INFO L628 ElimStorePlain]: treesize reduction 8, result has 88.1 percent of original size [2021-04-15 05:32:05,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-04-15 05:32:05,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:76 [2021-04-15 05:32:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:05,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:05,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-04-15 05:32:05,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259355683] [2021-04-15 05:32:05,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:32:05,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:05,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:32:05,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:32:05,359 INFO L87 Difference]: Start difference. First operand 1637 states and 5614 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:05,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:05,916 INFO L93 Difference]: Finished difference Result 2178 states and 7300 transitions. [2021-04-15 05:32:05,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:32:05,917 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:05,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:05,921 INFO L225 Difference]: With dead ends: 2178 [2021-04-15 05:32:05,921 INFO L226 Difference]: Without dead ends: 2163 [2021-04-15 05:32:05,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 533.8ms TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:32:05,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-04-15 05:32:05,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1655. [2021-04-15 05:32:05,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1654 states have (on average 3.4268440145102783) internal successors, (5668), 1654 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 5668 transitions. [2021-04-15 05:32:05,944 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 5668 transitions. Word has length 26 [2021-04-15 05:32:05,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:05,944 INFO L480 AbstractCegarLoop]: Abstraction has 1655 states and 5668 transitions. [2021-04-15 05:32:05,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:05,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 5668 transitions. [2021-04-15 05:32:05,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:05,947 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:05,947 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:06,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:06,154 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:06,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:06,154 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 46 times [2021-04-15 05:32:06,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:06,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118567126] [2021-04-15 05:32:06,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:06,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118567126] [2021-04-15 05:32:06,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042526903] [2021-04-15 05:32:06,298 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:06,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:32:06,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:06,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:32:06,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:06,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:06,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:06,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:32:06,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:06,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-04-15 05:32:06,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:32:06,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:06,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:06,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-04-15 05:32:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:06,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:06,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-04-15 05:32:06,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069361483] [2021-04-15 05:32:06,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:32:06,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:06,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:32:06,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:32:06,560 INFO L87 Difference]: Start difference. First operand 1655 states and 5668 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:07,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:07,744 INFO L93 Difference]: Finished difference Result 2191 states and 7346 transitions. [2021-04-15 05:32:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:32:07,744 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:07,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:07,748 INFO L225 Difference]: With dead ends: 2191 [2021-04-15 05:32:07,748 INFO L226 Difference]: Without dead ends: 2176 [2021-04-15 05:32:07,749 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 860.4ms TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:32:07,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-04-15 05:32:07,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1673. [2021-04-15 05:32:07,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 3.424043062200957) internal successors, (5725), 1672 states have internal predecessors, (5725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 5725 transitions. [2021-04-15 05:32:07,772 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 5725 transitions. Word has length 26 [2021-04-15 05:32:07,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:07,772 INFO L480 AbstractCegarLoop]: Abstraction has 1673 states and 5725 transitions. [2021-04-15 05:32:07,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:07,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 5725 transitions. [2021-04-15 05:32:07,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:07,775 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:07,775 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:07,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-04-15 05:32:07,975 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:07,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:07,976 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 47 times [2021-04-15 05:32:07,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:07,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393971434] [2021-04-15 05:32:07,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:07,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:08,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393971434] [2021-04-15 05:32:08,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480553612] [2021-04-15 05:32:08,123 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:08,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:32:08,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:08,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 05:32:08,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:08,410 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-04-15 05:32:08,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 54 [2021-04-15 05:32:08,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:32:08,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:08,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-04-15 05:32:08,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:67, output treesize:75 [2021-04-15 05:32:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:08,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:08,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:32:08,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300651135] [2021-04-15 05:32:08,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:32:08,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:08,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:32:08,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:32:08,542 INFO L87 Difference]: Start difference. First operand 1673 states and 5725 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:09,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:09,237 INFO L93 Difference]: Finished difference Result 2244 states and 7491 transitions. [2021-04-15 05:32:09,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 05:32:09,238 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:09,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:09,242 INFO L225 Difference]: With dead ends: 2244 [2021-04-15 05:32:09,242 INFO L226 Difference]: Without dead ends: 2219 [2021-04-15 05:32:09,242 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 714.1ms TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2021-04-15 05:32:09,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2021-04-15 05:32:09,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 1674. [2021-04-15 05:32:09,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.4273759713090257) internal successors, (5734), 1673 states have internal predecessors, (5734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5734 transitions. [2021-04-15 05:32:09,277 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5734 transitions. Word has length 26 [2021-04-15 05:32:09,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:09,277 INFO L480 AbstractCegarLoop]: Abstraction has 1674 states and 5734 transitions. [2021-04-15 05:32:09,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:09,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5734 transitions. [2021-04-15 05:32:09,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:09,279 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:09,280 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:09,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:09,480 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:09,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:09,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 48 times [2021-04-15 05:32:09,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:09,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24170116] [2021-04-15 05:32:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:09,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24170116] [2021-04-15 05:32:09,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388294986] [2021-04-15 05:32:09,665 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:09,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:32:09,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:09,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:32:09,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:09,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:09,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:09,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-04-15 05:32:09,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:32:09,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:09,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:09,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-04-15 05:32:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:09,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:09,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-04-15 05:32:09,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905058607] [2021-04-15 05:32:09,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:32:09,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:09,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:32:09,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:32:09,939 INFO L87 Difference]: Start difference. First operand 1674 states and 5734 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:10,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:10,758 INFO L93 Difference]: Finished difference Result 2307 states and 7682 transitions. [2021-04-15 05:32:10,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:32:10,758 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:10,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:10,762 INFO L225 Difference]: With dead ends: 2307 [2021-04-15 05:32:10,762 INFO L226 Difference]: Without dead ends: 2271 [2021-04-15 05:32:10,763 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 759.3ms TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:32:10,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2021-04-15 05:32:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 1692. [2021-04-15 05:32:10,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 3.4299231224127733) internal successors, (5800), 1691 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 5800 transitions. [2021-04-15 05:32:10,786 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 5800 transitions. Word has length 26 [2021-04-15 05:32:10,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:10,786 INFO L480 AbstractCegarLoop]: Abstraction has 1692 states and 5800 transitions. [2021-04-15 05:32:10,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:10,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 5800 transitions. [2021-04-15 05:32:10,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:10,788 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:10,788 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:10,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-04-15 05:32:10,989 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:10,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:10,990 INFO L82 PathProgramCache]: Analyzing trace with hash 2134220646, now seen corresponding path program 54 times [2021-04-15 05:32:10,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:10,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188583576] [2021-04-15 05:32:10,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:11,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188583576] [2021-04-15 05:32:11,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322585864] [2021-04-15 05:32:11,303 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:11,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:32:11,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:11,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:32:11,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:11,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:11,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:32:11,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:32:11,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-04-15 05:32:11,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:32:11,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:11,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:11,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-04-15 05:32:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:11,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:11,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-04-15 05:32:11,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77271955] [2021-04-15 05:32:11,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:32:11,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:11,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:32:11,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:32:11,522 INFO L87 Difference]: Start difference. First operand 1692 states and 5800 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:12,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:12,372 INFO L93 Difference]: Finished difference Result 2173 states and 7209 transitions. [2021-04-15 05:32:12,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:32:12,373 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:12,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:12,377 INFO L225 Difference]: With dead ends: 2173 [2021-04-15 05:32:12,377 INFO L226 Difference]: Without dead ends: 2147 [2021-04-15 05:32:12,377 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 960.8ms TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:32:12,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2021-04-15 05:32:12,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 1684. [2021-04-15 05:32:12,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 3.4307783719548426) internal successors, (5774), 1683 states have internal predecessors, (5774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:12,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 5774 transitions. [2021-04-15 05:32:12,399 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 5774 transitions. Word has length 26 [2021-04-15 05:32:12,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:12,399 INFO L480 AbstractCegarLoop]: Abstraction has 1684 states and 5774 transitions. [2021-04-15 05:32:12,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:12,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 5774 transitions. [2021-04-15 05:32:12,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:12,401 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:12,401 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:12,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:12,602 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:12,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:12,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 55 times [2021-04-15 05:32:12,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:12,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062163060] [2021-04-15 05:32:12,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:12,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062163060] [2021-04-15 05:32:12,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258687484] [2021-04-15 05:32:12,811 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:12,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:32:12,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:13,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:13,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:32:13,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:32:13,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-04-15 05:32:13,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:32:13,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:13,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:13,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-04-15 05:32:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:13,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:13,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-04-15 05:32:13,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485799173] [2021-04-15 05:32:13,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:32:13,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:13,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:32:13,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:32:13,035 INFO L87 Difference]: Start difference. First operand 1684 states and 5774 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:13,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:13,579 INFO L93 Difference]: Finished difference Result 2015 states and 6632 transitions. [2021-04-15 05:32:13,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:32:13,580 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:13,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:13,584 INFO L225 Difference]: With dead ends: 2015 [2021-04-15 05:32:13,584 INFO L226 Difference]: Without dead ends: 1993 [2021-04-15 05:32:13,584 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 599.2ms TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:32:13,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-04-15 05:32:13,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1686. [2021-04-15 05:32:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.430860534124629) internal successors, (5781), 1685 states have internal predecessors, (5781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5781 transitions. [2021-04-15 05:32:13,607 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5781 transitions. Word has length 26 [2021-04-15 05:32:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:13,607 INFO L480 AbstractCegarLoop]: Abstraction has 1686 states and 5781 transitions. [2021-04-15 05:32:13,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:13,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5781 transitions. [2021-04-15 05:32:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:13,610 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:13,610 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:13,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-04-15 05:32:13,813 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:13,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:13,813 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 56 times [2021-04-15 05:32:13,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:13,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437452512] [2021-04-15 05:32:13,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:14,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437452512] [2021-04-15 05:32:14,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616163703] [2021-04-15 05:32:14,099 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:14,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:32:14,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:14,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:32:14,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:14,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:14,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:14,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:32:14,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:32:14,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-04-15 05:32:14,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:32:14,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:14,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:14,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-04-15 05:32:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:14,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:14,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-04-15 05:32:14,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537634239] [2021-04-15 05:32:14,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:32:14,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:14,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:32:14,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:32:14,319 INFO L87 Difference]: Start difference. First operand 1686 states and 5781 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:14,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:14,994 INFO L93 Difference]: Finished difference Result 2069 states and 6957 transitions. [2021-04-15 05:32:14,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:32:14,995 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:14,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:14,999 INFO L225 Difference]: With dead ends: 2069 [2021-04-15 05:32:14,999 INFO L226 Difference]: Without dead ends: 2038 [2021-04-15 05:32:14,999 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 749.1ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:32:15,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-04-15 05:32:15,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1692. [2021-04-15 05:32:15,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 3.4287403903015967) internal successors, (5798), 1691 states have internal predecessors, (5798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:15,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 5798 transitions. [2021-04-15 05:32:15,021 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 5798 transitions. Word has length 26 [2021-04-15 05:32:15,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:15,021 INFO L480 AbstractCegarLoop]: Abstraction has 1692 states and 5798 transitions. [2021-04-15 05:32:15,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:15,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 5798 transitions. [2021-04-15 05:32:15,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:15,023 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:15,024 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:15,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-04-15 05:32:15,224 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:15,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:15,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 57 times [2021-04-15 05:32:15,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:15,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652374418] [2021-04-15 05:32:15,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:15,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652374418] [2021-04-15 05:32:15,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112634376] [2021-04-15 05:32:15,491 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:15,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:32:15,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:15,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:32:15,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:15,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:15,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:15,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-04-15 05:32:15,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:32:15,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:15,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:15,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:81 [2021-04-15 05:32:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:15,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:15,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:32:15,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179866801] [2021-04-15 05:32:15,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:32:15,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:15,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:32:15,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:32:15,929 INFO L87 Difference]: Start difference. First operand 1692 states and 5798 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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) [2021-04-15 05:32:16,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:16,591 INFO L93 Difference]: Finished difference Result 2105 states and 7051 transitions. [2021-04-15 05:32:16,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:32:16,592 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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 26 [2021-04-15 05:32:16,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:16,596 INFO L225 Difference]: With dead ends: 2105 [2021-04-15 05:32:16,596 INFO L226 Difference]: Without dead ends: 2090 [2021-04-15 05:32:16,596 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 880.5ms TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:32:16,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-04-15 05:32:16,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1692. [2021-04-15 05:32:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 3.4287403903015967) internal successors, (5798), 1691 states have internal predecessors, (5798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:16,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 5798 transitions. [2021-04-15 05:32:16,618 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 5798 transitions. Word has length 26 [2021-04-15 05:32:16,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:16,618 INFO L480 AbstractCegarLoop]: Abstraction has 1692 states and 5798 transitions. [2021-04-15 05:32:16,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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) [2021-04-15 05:32:16,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 5798 transitions. [2021-04-15 05:32:16,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:16,620 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:16,620 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:16,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:16,821 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:16,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:16,821 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 49 times [2021-04-15 05:32:16,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:16,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537596156] [2021-04-15 05:32:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:17,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537596156] [2021-04-15 05:32:17,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780819370] [2021-04-15 05:32:17,099 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:17,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:32:17,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:17,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:17,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:17,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:17,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2021-04-15 05:32:17,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:32:17,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:17,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:17,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-04-15 05:32:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:17,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:17,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-04-15 05:32:17,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747842764] [2021-04-15 05:32:17,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:32:17,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:17,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:32:17,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:32:17,352 INFO L87 Difference]: Start difference. First operand 1692 states and 5798 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:19,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:19,334 INFO L93 Difference]: Finished difference Result 2382 states and 7859 transitions. [2021-04-15 05:32:19,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:32:19,335 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:19,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:19,339 INFO L225 Difference]: With dead ends: 2382 [2021-04-15 05:32:19,339 INFO L226 Difference]: Without dead ends: 2367 [2021-04-15 05:32:19,339 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1381.7ms TimeCoverageRelationStatistics Valid=262, Invalid=1298, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 05:32:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2021-04-15 05:32:19,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 1699. [2021-04-15 05:32:19,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1698 states have (on average 3.4287396937573615) internal successors, (5822), 1698 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:19,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 5822 transitions. [2021-04-15 05:32:19,363 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 5822 transitions. Word has length 26 [2021-04-15 05:32:19,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:19,363 INFO L480 AbstractCegarLoop]: Abstraction has 1699 states and 5822 transitions. [2021-04-15 05:32:19,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:19,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 5822 transitions. [2021-04-15 05:32:19,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:19,365 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:19,365 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:19,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:19,566 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:19,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:19,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 58 times [2021-04-15 05:32:19,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:19,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918187965] [2021-04-15 05:32:19,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:19,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918187965] [2021-04-15 05:32:19,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170922581] [2021-04-15 05:32:19,803 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:19,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:32:19,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:19,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:32:19,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:20,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:32:20,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:20,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:20,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:32:20,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 05:32:20,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:32:20,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:20,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:20,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-04-15 05:32:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:20,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:20,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-04-15 05:32:20,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115279226] [2021-04-15 05:32:20,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:32:20,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:20,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:32:20,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:32:20,086 INFO L87 Difference]: Start difference. First operand 1699 states and 5822 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:21,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:21,242 INFO L93 Difference]: Finished difference Result 2569 states and 8218 transitions. [2021-04-15 05:32:21,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:32:21,243 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:21,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:21,248 INFO L225 Difference]: With dead ends: 2569 [2021-04-15 05:32:21,248 INFO L226 Difference]: Without dead ends: 2547 [2021-04-15 05:32:21,248 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1022.1ms TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:32:21,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2547 states. [2021-04-15 05:32:21,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 1746. [2021-04-15 05:32:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 3.428080229226361) internal successors, (5982), 1745 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:21,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 5982 transitions. [2021-04-15 05:32:21,280 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 5982 transitions. Word has length 26 [2021-04-15 05:32:21,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:21,280 INFO L480 AbstractCegarLoop]: Abstraction has 1746 states and 5982 transitions. [2021-04-15 05:32:21,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:21,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 5982 transitions. [2021-04-15 05:32:21,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:21,283 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:21,283 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:21,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:21,484 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:21,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:21,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 59 times [2021-04-15 05:32:21,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:21,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504048889] [2021-04-15 05:32:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:21,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:21,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504048889] [2021-04-15 05:32:21,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107550131] [2021-04-15 05:32:21,676 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:21,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:32:21,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:21,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:32:21,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:21,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:21,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:21,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:32:21,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:32:21,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-04-15 05:32:21,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:32:21,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:21,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:21,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-04-15 05:32:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:21,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:21,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-04-15 05:32:21,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018196712] [2021-04-15 05:32:21,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:32:21,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:21,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:32:21,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:32:21,947 INFO L87 Difference]: Start difference. First operand 1746 states and 5982 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:23,195 INFO L93 Difference]: Finished difference Result 3031 states and 9775 transitions. [2021-04-15 05:32:23,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:32:23,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:23,201 INFO L225 Difference]: With dead ends: 3031 [2021-04-15 05:32:23,201 INFO L226 Difference]: Without dead ends: 3001 [2021-04-15 05:32:23,201 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 943.9ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 05:32:23,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-04-15 05:32:23,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 1808. [2021-04-15 05:32:23,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1807 states have (on average 3.4305478693967904) internal successors, (6199), 1807 states have internal predecessors, (6199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 6199 transitions. [2021-04-15 05:32:23,229 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 6199 transitions. Word has length 26 [2021-04-15 05:32:23,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:23,229 INFO L480 AbstractCegarLoop]: Abstraction has 1808 states and 6199 transitions. [2021-04-15 05:32:23,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:23,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 6199 transitions. [2021-04-15 05:32:23,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:23,231 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:23,231 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:23,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:23,433 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:23,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:23,433 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 60 times [2021-04-15 05:32:23,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:23,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661183000] [2021-04-15 05:32:23,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:23,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661183000] [2021-04-15 05:32:23,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395396937] [2021-04-15 05:32:23,620 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:23,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:32:23,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:23,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:32:23,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:23,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:23,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:23,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 51 [2021-04-15 05:32:23,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:32:24,112 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-04-15 05:32:24,113 INFO L628 ElimStorePlain]: treesize reduction 95, result has 45.4 percent of original size [2021-04-15 05:32:24,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:24,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:325 [2021-04-15 05:32:24,311 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-04-15 05:32:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:24,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:24,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-04-15 05:32:24,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369985686] [2021-04-15 05:32:24,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:32:24,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:24,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:32:24,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:32:24,441 INFO L87 Difference]: Start difference. First operand 1808 states and 6199 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:26,600 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-04-15 05:32:26,954 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-04-15 05:32:27,382 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-04-15 05:32:27,548 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-04-15 05:32:27,973 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-04-15 05:32:28,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:28,162 INFO L93 Difference]: Finished difference Result 3468 states and 10976 transitions. [2021-04-15 05:32:28,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 05:32:28,163 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:28,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:28,168 INFO L225 Difference]: With dead ends: 3468 [2021-04-15 05:32:28,168 INFO L226 Difference]: Without dead ends: 3395 [2021-04-15 05:32:28,169 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 3238.7ms TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 05:32:28,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-04-15 05:32:28,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 1827. [2021-04-15 05:32:28,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.4342825848849947) internal successors, (6271), 1826 states have internal predecessors, (6271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:28,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6271 transitions. [2021-04-15 05:32:28,213 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6271 transitions. Word has length 26 [2021-04-15 05:32:28,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:28,213 INFO L480 AbstractCegarLoop]: Abstraction has 1827 states and 6271 transitions. [2021-04-15 05:32:28,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:28,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6271 transitions. [2021-04-15 05:32:28,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:28,216 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:28,216 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:28,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:28,417 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:28,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:28,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1345416738, now seen corresponding path program 50 times [2021-04-15 05:32:28,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:28,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325918287] [2021-04-15 05:32:28,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:28,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325918287] [2021-04-15 05:32:28,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443949517] [2021-04-15 05:32:28,636 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:28,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:32:28,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:28,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:32:28,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:28,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:28,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:28,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-04-15 05:32:28,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:32:28,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:28,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:28,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:120 [2021-04-15 05:32:29,111 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-04-15 05:32:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:29,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:29,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:32:29,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329739784] [2021-04-15 05:32:29,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:32:29,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:29,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:32:29,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:32:29,197 INFO L87 Difference]: Start difference. First operand 1827 states and 6271 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:31,227 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-04-15 05:32:32,086 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-04-15 05:32:32,543 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-04-15 05:32:32,922 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-04-15 05:32:33,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:33,029 INFO L93 Difference]: Finished difference Result 2596 states and 8537 transitions. [2021-04-15 05:32:33,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 05:32:33,030 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:33,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:33,034 INFO L225 Difference]: With dead ends: 2596 [2021-04-15 05:32:33,034 INFO L226 Difference]: Without dead ends: 2581 [2021-04-15 05:32:33,035 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 2957.1ms TimeCoverageRelationStatistics Valid=391, Invalid=2365, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 05:32:33,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2021-04-15 05:32:33,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 1845. [2021-04-15 05:32:33,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1844 states have (on average 3.4322125813449023) internal successors, (6329), 1844 states have internal predecessors, (6329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:33,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 6329 transitions. [2021-04-15 05:32:33,065 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 6329 transitions. Word has length 26 [2021-04-15 05:32:33,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:33,065 INFO L480 AbstractCegarLoop]: Abstraction has 1845 states and 6329 transitions. [2021-04-15 05:32:33,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:33,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 6329 transitions. [2021-04-15 05:32:33,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:33,067 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:33,067 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:33,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:33,268 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:33,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:33,268 INFO L82 PathProgramCache]: Analyzing trace with hash 294836038, now seen corresponding path program 51 times [2021-04-15 05:32:33,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:33,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947155938] [2021-04-15 05:32:33,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:33,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947155938] [2021-04-15 05:32:33,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933465032] [2021-04-15 05:32:33,480 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:33,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:32:33,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:33,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 05:32:33,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:33,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:33,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-04-15 05:32:33,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:32:33,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:33,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:33,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:77 [2021-04-15 05:32:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:33,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:33,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-04-15 05:32:33,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736557721] [2021-04-15 05:32:33,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:32:33,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:33,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:32:33,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:32:33,892 INFO L87 Difference]: Start difference. First operand 1845 states and 6329 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:35,952 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-04-15 05:32:36,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:36,521 INFO L93 Difference]: Finished difference Result 2945 states and 9563 transitions. [2021-04-15 05:32:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 05:32:36,522 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:36,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:36,528 INFO L225 Difference]: With dead ends: 2945 [2021-04-15 05:32:36,528 INFO L226 Difference]: Without dead ends: 2930 [2021-04-15 05:32:36,528 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1997.2ms TimeCoverageRelationStatistics Valid=324, Invalid=1568, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 05:32:36,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2021-04-15 05:32:36,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 1841. [2021-04-15 05:32:36,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 3.429891304347826) internal successors, (6311), 1840 states have internal predecessors, (6311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:36,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 6311 transitions. [2021-04-15 05:32:36,558 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 6311 transitions. Word has length 26 [2021-04-15 05:32:36,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:36,558 INFO L480 AbstractCegarLoop]: Abstraction has 1841 states and 6311 transitions. [2021-04-15 05:32:36,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:36,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 6311 transitions. [2021-04-15 05:32:36,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:36,561 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:36,561 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:36,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-04-15 05:32:36,762 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:36,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:36,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 52 times [2021-04-15 05:32:36,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:36,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263544571] [2021-04-15 05:32:36,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:36,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263544571] [2021-04-15 05:32:36,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831339864] [2021-04-15 05:32:36,954 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:36,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:32:36,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:36,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:32:36,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:37,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:37,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:37,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-04-15 05:32:37,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:32:37,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:37,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:37,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-04-15 05:32:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:37,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:37,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-04-15 05:32:37,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873282708] [2021-04-15 05:32:37,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:32:37,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:37,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:32:37,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:32:37,242 INFO L87 Difference]: Start difference. First operand 1841 states and 6311 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:38,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:38,410 INFO L93 Difference]: Finished difference Result 2554 states and 8486 transitions. [2021-04-15 05:32:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 05:32:38,411 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:38,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:38,430 INFO L225 Difference]: With dead ends: 2554 [2021-04-15 05:32:38,431 INFO L226 Difference]: Without dead ends: 2529 [2021-04-15 05:32:38,431 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 821.7ms TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:32:38,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2021-04-15 05:32:38,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 1829. [2021-04-15 05:32:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1828 states have (on average 3.4343544857768054) internal successors, (6278), 1828 states have internal predecessors, (6278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:38,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 6278 transitions. [2021-04-15 05:32:38,456 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 6278 transitions. Word has length 26 [2021-04-15 05:32:38,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:38,465 INFO L480 AbstractCegarLoop]: Abstraction has 1829 states and 6278 transitions. [2021-04-15 05:32:38,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:38,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 6278 transitions. [2021-04-15 05:32:38,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:38,469 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:38,469 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:38,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-04-15 05:32:38,685 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:38,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:38,686 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 61 times [2021-04-15 05:32:38,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:38,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762889807] [2021-04-15 05:32:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:38,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762889807] [2021-04-15 05:32:38,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455945962] [2021-04-15 05:32:38,936 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:38,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:32:38,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:39,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:32:39,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:39,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:32:39,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-04-15 05:32:39,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:32:39,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:39,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:39,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-04-15 05:32:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:39,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:39,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-04-15 05:32:39,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391804279] [2021-04-15 05:32:39,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:32:39,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:39,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:32:39,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:32:39,221 INFO L87 Difference]: Start difference. First operand 1829 states and 6278 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:40,831 INFO L93 Difference]: Finished difference Result 2460 states and 8152 transitions. [2021-04-15 05:32:40,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:32:40,832 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:40,837 INFO L225 Difference]: With dead ends: 2460 [2021-04-15 05:32:40,837 INFO L226 Difference]: Without dead ends: 2438 [2021-04-15 05:32:40,837 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1287.0ms TimeCoverageRelationStatistics Valid=253, Invalid=1007, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 05:32:40,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-04-15 05:32:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 1826. [2021-04-15 05:32:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 3.433972602739726) internal successors, (6267), 1825 states have internal predecessors, (6267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:40,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 6267 transitions. [2021-04-15 05:32:40,864 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 6267 transitions. Word has length 26 [2021-04-15 05:32:40,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:40,864 INFO L480 AbstractCegarLoop]: Abstraction has 1826 states and 6267 transitions. [2021-04-15 05:32:40,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:40,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 6267 transitions. [2021-04-15 05:32:40,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:40,867 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:40,867 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:41,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-04-15 05:32:41,068 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:41,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:41,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1861203518, now seen corresponding path program 62 times [2021-04-15 05:32:41,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:41,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723423744] [2021-04-15 05:32:41,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:41,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723423744] [2021-04-15 05:32:41,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95374971] [2021-04-15 05:32:41,324 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:41,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:32:41,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:41,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:32:41,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:41,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:32:41,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:41,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:41,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:32:41,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 05:32:41,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:32:41,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:41,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:41,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-04-15 05:32:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:41,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:41,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-04-15 05:32:41,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087084183] [2021-04-15 05:32:41,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:32:41,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:41,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:32:41,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:32:41,632 INFO L87 Difference]: Start difference. First operand 1826 states and 6267 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:43,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:43,405 INFO L93 Difference]: Finished difference Result 2532 states and 8399 transitions. [2021-04-15 05:32:43,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:32:43,406 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:43,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:43,412 INFO L225 Difference]: With dead ends: 2532 [2021-04-15 05:32:43,412 INFO L226 Difference]: Without dead ends: 2513 [2021-04-15 05:32:43,412 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1500.9ms TimeCoverageRelationStatistics Valid=293, Invalid=1039, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 05:32:43,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-04-15 05:32:43,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1829. [2021-04-15 05:32:43,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1828 states have (on average 3.435995623632385) internal successors, (6281), 1828 states have internal predecessors, (6281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:43,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 6281 transitions. [2021-04-15 05:32:43,442 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 6281 transitions. Word has length 26 [2021-04-15 05:32:43,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:43,442 INFO L480 AbstractCegarLoop]: Abstraction has 1829 states and 6281 transitions. [2021-04-15 05:32:43,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:43,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 6281 transitions. [2021-04-15 05:32:43,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:43,446 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:43,446 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:43,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:43,662 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:43,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:43,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1211067586, now seen corresponding path program 63 times [2021-04-15 05:32:43,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:43,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454207576] [2021-04-15 05:32:43,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:43,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454207576] [2021-04-15 05:32:43,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706713726] [2021-04-15 05:32:43,936 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:43,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:32:43,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:43,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:32:43,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:44,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:44,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:44,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:44,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-04-15 05:32:44,152 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-04-15 05:32:44,184 INFO L628 ElimStorePlain]: treesize reduction 17, result has 55.3 percent of original size [2021-04-15 05:32:44,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:44,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-04-15 05:32:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:44,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:44,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-04-15 05:32:44,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343861670] [2021-04-15 05:32:44,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:32:44,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:44,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:32:44,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:32:44,258 INFO L87 Difference]: Start difference. First operand 1829 states and 6281 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:46,067 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-04-15 05:32:46,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:46,191 INFO L93 Difference]: Finished difference Result 2965 states and 9658 transitions. [2021-04-15 05:32:46,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:32:46,192 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:46,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:46,197 INFO L225 Difference]: With dead ends: 2965 [2021-04-15 05:32:46,198 INFO L226 Difference]: Without dead ends: 2921 [2021-04-15 05:32:46,198 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1718.1ms TimeCoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 05:32:46,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-04-15 05:32:46,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 1870. [2021-04-15 05:32:46,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 3.431246655965757) internal successors, (6413), 1869 states have internal predecessors, (6413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:46,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 6413 transitions. [2021-04-15 05:32:46,230 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 6413 transitions. Word has length 26 [2021-04-15 05:32:46,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:46,230 INFO L480 AbstractCegarLoop]: Abstraction has 1870 states and 6413 transitions. [2021-04-15 05:32:46,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:46,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 6413 transitions. [2021-04-15 05:32:46,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:46,233 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:46,233 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:46,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-04-15 05:32:46,433 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:46,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:46,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1633671286, now seen corresponding path program 53 times [2021-04-15 05:32:46,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:46,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496367996] [2021-04-15 05:32:46,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:46,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496367996] [2021-04-15 05:32:46,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230581326] [2021-04-15 05:32:46,626 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:46,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:32:46,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:46,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:32:46,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:46,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:46,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:32:46,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 05:32:46,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:32:46,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:46,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:46,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-04-15 05:32:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:47,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:47,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:32:47,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793334651] [2021-04-15 05:32:47,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:32:47,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:47,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:32:47,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:32:47,026 INFO L87 Difference]: Start difference. First operand 1870 states and 6413 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:47,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:47,979 INFO L93 Difference]: Finished difference Result 2376 states and 7962 transitions. [2021-04-15 05:32:47,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 05:32:47,980 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:47,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:47,984 INFO L225 Difference]: With dead ends: 2376 [2021-04-15 05:32:47,984 INFO L226 Difference]: Without dead ends: 2361 [2021-04-15 05:32:47,985 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 798.0ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:32:47,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-04-15 05:32:48,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1867. [2021-04-15 05:32:48,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.4260450160771705) internal successors, (6393), 1866 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6393 transitions. [2021-04-15 05:32:48,009 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6393 transitions. Word has length 26 [2021-04-15 05:32:48,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:48,009 INFO L480 AbstractCegarLoop]: Abstraction has 1867 states and 6393 transitions. [2021-04-15 05:32:48,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:48,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6393 transitions. [2021-04-15 05:32:48,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:48,012 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:48,012 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:48,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:48,212 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:48,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:48,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 54 times [2021-04-15 05:32:48,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:48,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571889663] [2021-04-15 05:32:48,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:48,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571889663] [2021-04-15 05:32:48,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275437572] [2021-04-15 05:32:48,407 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:48,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:32:48,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:48,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:32:48,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:48,672 INFO L354 Elim1Store]: treesize reduction 35, result has 36.4 percent of original size [2021-04-15 05:32:48,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 67 [2021-04-15 05:32:48,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:32:48,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:48,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:48,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:35 [2021-04-15 05:32:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:48,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:48,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:32:48,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004229440] [2021-04-15 05:32:48,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:32:48,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:48,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:32:48,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:32:48,815 INFO L87 Difference]: Start difference. First operand 1867 states and 6393 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:50,215 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-04-15 05:32:50,717 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-04-15 05:32:50,864 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-04-15 05:32:51,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:51,892 INFO L93 Difference]: Finished difference Result 2818 states and 9211 transitions. [2021-04-15 05:32:51,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 05:32:51,893 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:51,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:51,899 INFO L225 Difference]: With dead ends: 2818 [2021-04-15 05:32:51,899 INFO L226 Difference]: Without dead ends: 2753 [2021-04-15 05:32:51,899 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2182.7ms TimeCoverageRelationStatistics Valid=355, Invalid=1901, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:32:51,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2021-04-15 05:32:51,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 1890. [2021-04-15 05:32:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.4187400741132876) internal successors, (6458), 1889 states have internal predecessors, (6458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:51,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6458 transitions. [2021-04-15 05:32:51,930 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6458 transitions. Word has length 26 [2021-04-15 05:32:51,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:51,930 INFO L480 AbstractCegarLoop]: Abstraction has 1890 states and 6458 transitions. [2021-04-15 05:32:51,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:51,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6458 transitions. [2021-04-15 05:32:51,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:51,933 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:51,933 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:52,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-04-15 05:32:52,133 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:52,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:52,134 INFO L82 PathProgramCache]: Analyzing trace with hash -322804878, now seen corresponding path program 55 times [2021-04-15 05:32:52,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:52,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849485843] [2021-04-15 05:32:52,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:52,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:52,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849485843] [2021-04-15 05:32:52,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667807551] [2021-04-15 05:32:52,359 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:52,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:32:52,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:52,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:52,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:52,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-04-15 05:32:52,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 05:32:52,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:52,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:52,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-04-15 05:32:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:52,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:52,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-04-15 05:32:52,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075541946] [2021-04-15 05:32:52,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:32:52,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:52,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:32:52,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:32:52,686 INFO L87 Difference]: Start difference. First operand 1890 states and 6458 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:54,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:54,334 INFO L93 Difference]: Finished difference Result 2691 states and 8967 transitions. [2021-04-15 05:32:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:32:54,335 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:54,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:54,340 INFO L225 Difference]: With dead ends: 2691 [2021-04-15 05:32:54,340 INFO L226 Difference]: Without dead ends: 2676 [2021-04-15 05:32:54,341 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1227.5ms TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:32:54,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-04-15 05:32:54,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 1879. [2021-04-15 05:32:54,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 3.4222577209797658) internal successors, (6427), 1878 states have internal predecessors, (6427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6427 transitions. [2021-04-15 05:32:54,369 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6427 transitions. Word has length 26 [2021-04-15 05:32:54,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:54,370 INFO L480 AbstractCegarLoop]: Abstraction has 1879 states and 6427 transitions. [2021-04-15 05:32:54,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:54,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6427 transitions. [2021-04-15 05:32:54,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:54,372 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:54,372 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:54,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-04-15 05:32:54,573 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:54,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:54,573 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 56 times [2021-04-15 05:32:54,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:54,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900317707] [2021-04-15 05:32:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:54,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900317707] [2021-04-15 05:32:54,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200444512] [2021-04-15 05:32:54,783 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:54,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:32:54,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:54,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:32:54,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:55,043 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-04-15 05:32:55,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-04-15 05:32:55,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:32:55,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:55,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:55,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:17 [2021-04-15 05:32:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:55,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:55,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-04-15 05:32:55,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805660043] [2021-04-15 05:32:55,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:32:55,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:55,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:32:55,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:32:55,131 INFO L87 Difference]: Start difference. First operand 1879 states and 6427 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:56,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:56,522 INFO L93 Difference]: Finished difference Result 2580 states and 8592 transitions. [2021-04-15 05:32:56,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:32:56,523 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:56,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:56,529 INFO L225 Difference]: With dead ends: 2580 [2021-04-15 05:32:56,529 INFO L226 Difference]: Without dead ends: 2544 [2021-04-15 05:32:56,529 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1045.5ms TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:32:56,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-04-15 05:32:56,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 1879. [2021-04-15 05:32:56,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 3.4222577209797658) internal successors, (6427), 1878 states have internal predecessors, (6427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:56,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6427 transitions. [2021-04-15 05:32:56,557 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6427 transitions. Word has length 26 [2021-04-15 05:32:56,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:56,557 INFO L480 AbstractCegarLoop]: Abstraction has 1879 states and 6427 transitions. [2021-04-15 05:32:56,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:56,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6427 transitions. [2021-04-15 05:32:56,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:56,560 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:56,560 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:56,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-04-15 05:32:56,762 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:56,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:56,763 INFO L82 PathProgramCache]: Analyzing trace with hash -89207746, now seen corresponding path program 64 times [2021-04-15 05:32:56,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:56,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997589622] [2021-04-15 05:32:56,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:57,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997589622] [2021-04-15 05:32:57,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708184627] [2021-04-15 05:32:57,145 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:57,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:32:57,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:57,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:32:57,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:57,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:57,458 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-04-15 05:32:57,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 56 [2021-04-15 05:32:57,465 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:57,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:57,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:57,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:87, output treesize:10 [2021-04-15 05:32:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:57,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:57,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-04-15 05:32:57,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117468379] [2021-04-15 05:32:57,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:32:57,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:57,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:32:57,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:32:57,514 INFO L87 Difference]: Start difference. First operand 1879 states and 6427 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) [2021-04-15 05:32:59,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:32:59,060 INFO L93 Difference]: Finished difference Result 2397 states and 7991 transitions. [2021-04-15 05:32:59,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:32:59,061 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:32:59,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:32:59,065 INFO L225 Difference]: With dead ends: 2397 [2021-04-15 05:32:59,066 INFO L226 Difference]: Without dead ends: 2382 [2021-04-15 05:32:59,066 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1496.3ms TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:32:59,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-04-15 05:32:59,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1879. [2021-04-15 05:32:59,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 3.4222577209797658) internal successors, (6427), 1878 states have internal predecessors, (6427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:32:59,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6427 transitions. [2021-04-15 05:32:59,091 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6427 transitions. Word has length 26 [2021-04-15 05:32:59,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:32:59,091 INFO L480 AbstractCegarLoop]: Abstraction has 1879 states and 6427 transitions. [2021-04-15 05:32:59,091 INFO L481 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) [2021-04-15 05:32:59,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6427 transitions. [2021-04-15 05:32:59,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:32:59,094 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:32:59,094 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:32:59,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:59,294 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:32:59,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:32:59,295 INFO L82 PathProgramCache]: Analyzing trace with hash -63112514, now seen corresponding path program 65 times [2021-04-15 05:32:59,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:32:59,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841120266] [2021-04-15 05:32:59,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:32:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:32:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:59,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841120266] [2021-04-15 05:32:59,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469637897] [2021-04-15 05:32:59,523 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:32:59,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:32:59,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:32:59,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:32:59,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:32:59,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:59,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:32:59,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:32:59,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-04-15 05:32:59,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 05:32:59,791 INFO L628 ElimStorePlain]: treesize reduction 24, result has 46.7 percent of original size [2021-04-15 05:32:59,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:32:59,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-04-15 05:32:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:32:59,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:32:59,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-04-15 05:32:59,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145223143] [2021-04-15 05:32:59,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:32:59,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:32:59,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:32:59,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:32:59,878 INFO L87 Difference]: Start difference. First operand 1879 states and 6427 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:00,549 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-04-15 05:33:01,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:01,255 INFO L93 Difference]: Finished difference Result 2617 states and 8669 transitions. [2021-04-15 05:33:01,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:33:01,256 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:33:01,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:01,261 INFO L225 Difference]: With dead ends: 2617 [2021-04-15 05:33:01,262 INFO L226 Difference]: Without dead ends: 2587 [2021-04-15 05:33:01,262 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1085.5ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:33:01,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-04-15 05:33:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 1866. [2021-04-15 05:33:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.4176943699731903) internal successors, (6374), 1865 states have internal predecessors, (6374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:01,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6374 transitions. [2021-04-15 05:33:01,289 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6374 transitions. Word has length 26 [2021-04-15 05:33:01,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:01,289 INFO L480 AbstractCegarLoop]: Abstraction has 1866 states and 6374 transitions. [2021-04-15 05:33:01,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6374 transitions. [2021-04-15 05:33:01,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:01,292 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:01,292 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:01,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:01,492 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:01,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:01,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 57 times [2021-04-15 05:33:01,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:01,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109358031] [2021-04-15 05:33:01,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:01,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109358031] [2021-04-15 05:33:01,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108245883] [2021-04-15 05:33:01,557 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:01,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:33:01,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:01,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:01,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:01,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:01,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 05:33:01,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167052218] [2021-04-15 05:33:01,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:33:01,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:01,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:33:01,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:33:01,754 INFO L87 Difference]: Start difference. First operand 1866 states and 6374 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:03,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:03,234 INFO L93 Difference]: Finished difference Result 4807 states and 14882 transitions. [2021-04-15 05:33:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 05:33:03,235 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:03,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:03,244 INFO L225 Difference]: With dead ends: 4807 [2021-04-15 05:33:03,245 INFO L226 Difference]: Without dead ends: 4807 [2021-04-15 05:33:03,245 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 865.1ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-04-15 05:33:03,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2021-04-15 05:33:03,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 2064. [2021-04-15 05:33:03,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 3.4755210857973826) internal successors, (7170), 2063 states have internal predecessors, (7170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:03,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 7170 transitions. [2021-04-15 05:33:03,292 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 7170 transitions. Word has length 28 [2021-04-15 05:33:03,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:03,292 INFO L480 AbstractCegarLoop]: Abstraction has 2064 states and 7170 transitions. [2021-04-15 05:33:03,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:03,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 7170 transitions. [2021-04-15 05:33:03,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:03,295 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:03,295 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:03,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:03,496 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:03,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:03,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 58 times [2021-04-15 05:33:03,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:03,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894538284] [2021-04-15 05:33:03,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:03,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894538284] [2021-04-15 05:33:03,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300486600] [2021-04-15 05:33:03,582 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:33:03,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:33:03,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:03,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:03,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:03,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:03,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 05:33:03,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979144546] [2021-04-15 05:33:03,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:33:03,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:03,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:33:03,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:33:03,831 INFO L87 Difference]: Start difference. First operand 2064 states and 7170 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:05,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:05,830 INFO L93 Difference]: Finished difference Result 6392 states and 19484 transitions. [2021-04-15 05:33:05,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-04-15 05:33:05,832 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:05,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:05,845 INFO L225 Difference]: With dead ends: 6392 [2021-04-15 05:33:05,845 INFO L226 Difference]: Without dead ends: 6392 [2021-04-15 05:33:05,846 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 1251.0ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-04-15 05:33:05,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6392 states. [2021-04-15 05:33:05,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6392 to 2078. [2021-04-15 05:33:05,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 2077 states have (on average 3.4848338950409246) internal successors, (7238), 2077 states have internal predecessors, (7238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:05,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 7238 transitions. [2021-04-15 05:33:05,907 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 7238 transitions. Word has length 28 [2021-04-15 05:33:05,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:05,907 INFO L480 AbstractCegarLoop]: Abstraction has 2078 states and 7238 transitions. [2021-04-15 05:33:05,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:05,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 7238 transitions. [2021-04-15 05:33:05,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:05,910 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:05,910 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:06,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-04-15 05:33:06,111 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:06,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:06,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 59 times [2021-04-15 05:33:06,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:06,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607204685] [2021-04-15 05:33:06,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:06,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607204685] [2021-04-15 05:33:06,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494172016] [2021-04-15 05:33:06,179 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:06,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:33:06,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:06,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:06,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:06,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:06,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 05:33:06,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799264734] [2021-04-15 05:33:06,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:33:06,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:06,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:33:06,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:33:06,399 INFO L87 Difference]: Start difference. First operand 2078 states and 7238 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:08,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:08,391 INFO L93 Difference]: Finished difference Result 5781 states and 18006 transitions. [2021-04-15 05:33:08,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-04-15 05:33:08,392 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:08,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:08,403 INFO L225 Difference]: With dead ends: 5781 [2021-04-15 05:33:08,403 INFO L226 Difference]: Without dead ends: 5781 [2021-04-15 05:33:08,404 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 1203.3ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-04-15 05:33:08,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5781 states. [2021-04-15 05:33:08,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5781 to 2023. [2021-04-15 05:33:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.4579624134520275) internal successors, (6992), 2022 states have internal predecessors, (6992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:08,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 6992 transitions. [2021-04-15 05:33:08,456 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 6992 transitions. Word has length 28 [2021-04-15 05:33:08,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:08,456 INFO L480 AbstractCegarLoop]: Abstraction has 2023 states and 6992 transitions. [2021-04-15 05:33:08,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:08,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 6992 transitions. [2021-04-15 05:33:08,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:08,459 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:08,459 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:08,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:08,660 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:08,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:08,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 60 times [2021-04-15 05:33:08,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:08,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421907785] [2021-04-15 05:33:08,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:08,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421907785] [2021-04-15 05:33:08,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639887714] [2021-04-15 05:33:08,744 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:08,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:33:08,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:08,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:08,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:08,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:08,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 05:33:08,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834561835] [2021-04-15 05:33:08,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:33:08,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:08,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:33:08,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:33:08,938 INFO L87 Difference]: Start difference. First operand 2023 states and 6992 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:10,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:10,710 INFO L93 Difference]: Finished difference Result 4893 states and 15049 transitions. [2021-04-15 05:33:10,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-04-15 05:33:10,712 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:10,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:10,721 INFO L225 Difference]: With dead ends: 4893 [2021-04-15 05:33:10,721 INFO L226 Difference]: Without dead ends: 4893 [2021-04-15 05:33:10,722 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 1080.5ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-04-15 05:33:10,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4893 states. [2021-04-15 05:33:10,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4893 to 2033. [2021-04-15 05:33:10,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.453740157480315) internal successors, (7018), 2032 states have internal predecessors, (7018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:10,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 7018 transitions. [2021-04-15 05:33:10,767 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 7018 transitions. Word has length 28 [2021-04-15 05:33:10,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:10,767 INFO L480 AbstractCegarLoop]: Abstraction has 2033 states and 7018 transitions. [2021-04-15 05:33:10,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:10,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 7018 transitions. [2021-04-15 05:33:10,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:10,770 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:10,770 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:10,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:10,973 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:10,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 66 times [2021-04-15 05:33:10,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:10,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187817455] [2021-04-15 05:33:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:11,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187817455] [2021-04-15 05:33:11,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567861180] [2021-04-15 05:33:11,059 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:11,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:33:11,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:11,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:11,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:11,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:11,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-04-15 05:33:11,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363571585] [2021-04-15 05:33:11,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:33:11,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:11,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:33:11,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:33:11,247 INFO L87 Difference]: Start difference. First operand 2033 states and 7018 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:12,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:12,328 INFO L93 Difference]: Finished difference Result 4312 states and 13444 transitions. [2021-04-15 05:33:12,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 05:33:12,328 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:12,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:12,337 INFO L225 Difference]: With dead ends: 4312 [2021-04-15 05:33:12,337 INFO L226 Difference]: Without dead ends: 4312 [2021-04-15 05:33:12,337 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 550.6ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 05:33:12,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2021-04-15 05:33:12,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 2089. [2021-04-15 05:33:12,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2088 states have (on average 3.439176245210728) internal successors, (7181), 2088 states have internal predecessors, (7181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:12,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 7181 transitions. [2021-04-15 05:33:12,383 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 7181 transitions. Word has length 28 [2021-04-15 05:33:12,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:12,383 INFO L480 AbstractCegarLoop]: Abstraction has 2089 states and 7181 transitions. [2021-04-15 05:33:12,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:12,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 7181 transitions. [2021-04-15 05:33:12,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:12,386 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:12,386 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:12,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:12,600 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:12,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:12,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 61 times [2021-04-15 05:33:12,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:12,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752635896] [2021-04-15 05:33:12,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:33:12,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752635896] [2021-04-15 05:33:12,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475166344] [2021-04-15 05:33:12,670 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:12,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:33:12,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:33:12,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:12,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:33:12,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259036889] [2021-04-15 05:33:12,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:33:12,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:12,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:33:12,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:33:12,825 INFO L87 Difference]: Start difference. First operand 2089 states and 7181 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:13,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:13,116 INFO L93 Difference]: Finished difference Result 3577 states and 11658 transitions. [2021-04-15 05:33:13,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:33:13,117 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:13,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:13,124 INFO L225 Difference]: With dead ends: 3577 [2021-04-15 05:33:13,125 INFO L226 Difference]: Without dead ends: 3553 [2021-04-15 05:33:13,125 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:33:13,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2021-04-15 05:33:13,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 2470. [2021-04-15 05:33:13,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 2469 states have (on average 3.5107330903199676) internal successors, (8668), 2469 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:13,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 8668 transitions. [2021-04-15 05:33:13,186 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 8668 transitions. Word has length 28 [2021-04-15 05:33:13,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:13,187 INFO L480 AbstractCegarLoop]: Abstraction has 2470 states and 8668 transitions. [2021-04-15 05:33:13,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:13,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 8668 transitions. [2021-04-15 05:33:13,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:13,191 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:13,191 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:13,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:13,391 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:13,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:13,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 62 times [2021-04-15 05:33:13,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:13,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260152595] [2021-04-15 05:33:13,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:13,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260152595] [2021-04-15 05:33:13,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095508987] [2021-04-15 05:33:13,458 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:13,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:33:13,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:13,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:33:13,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:13,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:13,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-04-15 05:33:13,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557835065] [2021-04-15 05:33:13,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:33:13,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:13,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:33:13,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:33:13,640 INFO L87 Difference]: Start difference. First operand 2470 states and 8668 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:14,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:14,742 INFO L93 Difference]: Finished difference Result 4198 states and 13424 transitions. [2021-04-15 05:33:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 05:33:14,743 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:14,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:14,752 INFO L225 Difference]: With dead ends: 4198 [2021-04-15 05:33:14,752 INFO L226 Difference]: Without dead ends: 4151 [2021-04-15 05:33:14,752 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 667.9ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 05:33:14,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-04-15 05:33:14,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 2635. [2021-04-15 05:33:14,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 3.5292331055429007) internal successors, (9296), 2634 states have internal predecessors, (9296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:14,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 9296 transitions. [2021-04-15 05:33:14,802 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 9296 transitions. Word has length 28 [2021-04-15 05:33:14,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:14,802 INFO L480 AbstractCegarLoop]: Abstraction has 2635 states and 9296 transitions. [2021-04-15 05:33:14,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:14,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 9296 transitions. [2021-04-15 05:33:14,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:14,806 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:14,806 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:15,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-04-15 05:33:15,007 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:15,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:15,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1904037996, now seen corresponding path program 67 times [2021-04-15 05:33:15,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:15,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593527013] [2021-04-15 05:33:15,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:15,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593527013] [2021-04-15 05:33:15,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136028179] [2021-04-15 05:33:15,078 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:15,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:15,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:15,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:15,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 05:33:15,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216289020] [2021-04-15 05:33:15,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:33:15,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:15,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:33:15,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:33:15,289 INFO L87 Difference]: Start difference. First operand 2635 states and 9296 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:16,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:16,018 INFO L93 Difference]: Finished difference Result 5078 states and 16878 transitions. [2021-04-15 05:33:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:33:16,020 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:16,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:16,030 INFO L225 Difference]: With dead ends: 5078 [2021-04-15 05:33:16,031 INFO L226 Difference]: Without dead ends: 4991 [2021-04-15 05:33:16,031 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 563.4ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:33:16,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4991 states. [2021-04-15 05:33:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4991 to 3295. [2021-04-15 05:33:16,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3294 states have (on average 3.5491803278688523) internal successors, (11691), 3294 states have internal predecessors, (11691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:16,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 11691 transitions. [2021-04-15 05:33:16,118 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 11691 transitions. Word has length 28 [2021-04-15 05:33:16,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:16,118 INFO L480 AbstractCegarLoop]: Abstraction has 3295 states and 11691 transitions. [2021-04-15 05:33:16,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:16,118 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 11691 transitions. [2021-04-15 05:33:16,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:16,123 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:16,123 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:16,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-04-15 05:33:16,337 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:16,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:16,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 63 times [2021-04-15 05:33:16,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:16,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676283712] [2021-04-15 05:33:16,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:16,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676283712] [2021-04-15 05:33:16,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008393504] [2021-04-15 05:33:16,394 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:16,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:33:16,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:16,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:33:16,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:16,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:16,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-04-15 05:33:16,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892783193] [2021-04-15 05:33:16,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:33:16,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:16,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:33:16,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:33:16,603 INFO L87 Difference]: Start difference. First operand 3295 states and 11691 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:17,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:17,805 INFO L93 Difference]: Finished difference Result 5501 states and 17502 transitions. [2021-04-15 05:33:17,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 05:33:17,806 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:17,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:17,815 INFO L225 Difference]: With dead ends: 5501 [2021-04-15 05:33:17,815 INFO L226 Difference]: Without dead ends: 5475 [2021-04-15 05:33:17,816 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 734.5ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 05:33:17,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5475 states. [2021-04-15 05:33:17,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5475 to 3313. [2021-04-15 05:33:17,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 3.5543478260869565) internal successors, (11772), 3312 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:17,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 11772 transitions. [2021-04-15 05:33:17,883 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 11772 transitions. Word has length 28 [2021-04-15 05:33:17,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:17,883 INFO L480 AbstractCegarLoop]: Abstraction has 3313 states and 11772 transitions. [2021-04-15 05:33:17,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:17,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 11772 transitions. [2021-04-15 05:33:17,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:17,888 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:17,888 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:18,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable366,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:18,089 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:18,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:18,089 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 64 times [2021-04-15 05:33:18,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:18,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792098540] [2021-04-15 05:33:18,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:18,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792098540] [2021-04-15 05:33:18,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089814956] [2021-04-15 05:33:18,152 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:18,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:33:18,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:18,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:33:18,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:18,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:18,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-04-15 05:33:18,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824512748] [2021-04-15 05:33:18,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:33:18,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:18,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:33:18,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:33:18,341 INFO L87 Difference]: Start difference. First operand 3313 states and 11772 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:19,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:19,629 INFO L93 Difference]: Finished difference Result 5556 states and 17694 transitions. [2021-04-15 05:33:19,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 05:33:19,631 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:19,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:19,641 INFO L225 Difference]: With dead ends: 5556 [2021-04-15 05:33:19,641 INFO L226 Difference]: Without dead ends: 5525 [2021-04-15 05:33:19,642 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 752.7ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 05:33:19,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-04-15 05:33:19,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 3306. [2021-04-15 05:33:19,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3306 states, 3305 states have (on average 3.5606656580937974) internal successors, (11768), 3305 states have internal predecessors, (11768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:19,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3306 states to 3306 states and 11768 transitions. [2021-04-15 05:33:19,712 INFO L78 Accepts]: Start accepts. Automaton has 3306 states and 11768 transitions. Word has length 28 [2021-04-15 05:33:19,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:19,713 INFO L480 AbstractCegarLoop]: Abstraction has 3306 states and 11768 transitions. [2021-04-15 05:33:19,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:19,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3306 states and 11768 transitions. [2021-04-15 05:33:19,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:19,718 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:19,718 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:19,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-04-15 05:33:19,918 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:19,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:19,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 65 times [2021-04-15 05:33:19,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:19,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942315895] [2021-04-15 05:33:19,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:19,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942315895] [2021-04-15 05:33:19,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740286043] [2021-04-15 05:33:19,985 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:20,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:33:20,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:20,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:33:20,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:20,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:20,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:33:20,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317439573] [2021-04-15 05:33:20,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:33:20,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:20,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:33:20,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:33:20,145 INFO L87 Difference]: Start difference. First operand 3306 states and 11768 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:21,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:21,121 INFO L93 Difference]: Finished difference Result 6732 states and 21804 transitions. [2021-04-15 05:33:21,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 05:33:21,123 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:21,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:21,136 INFO L225 Difference]: With dead ends: 6732 [2021-04-15 05:33:21,137 INFO L226 Difference]: Without dead ends: 6685 [2021-04-15 05:33:21,137 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 566.9ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 05:33:21,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6685 states. [2021-04-15 05:33:21,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6685 to 3469. [2021-04-15 05:33:21,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3469 states, 3468 states have (on average 3.605824682814302) internal successors, (12505), 3468 states have internal predecessors, (12505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3469 states to 3469 states and 12505 transitions. [2021-04-15 05:33:21,247 INFO L78 Accepts]: Start accepts. Automaton has 3469 states and 12505 transitions. Word has length 28 [2021-04-15 05:33:21,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:21,247 INFO L480 AbstractCegarLoop]: Abstraction has 3469 states and 12505 transitions. [2021-04-15 05:33:21,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:21,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3469 states and 12505 transitions. [2021-04-15 05:33:21,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:21,253 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:21,253 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:21,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-04-15 05:33:21,453 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:21,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:21,454 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 66 times [2021-04-15 05:33:21,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:21,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809210026] [2021-04-15 05:33:21,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:21,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:33:21,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809210026] [2021-04-15 05:33:21,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208774604] [2021-04-15 05:33:21,495 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:21,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:33:21,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:21,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:33:21,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:33:21,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:21,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 05:33:21,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122668565] [2021-04-15 05:33:21,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:33:21,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:21,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:33:21,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:33:21,654 INFO L87 Difference]: Start difference. First operand 3469 states and 12505 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:21,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:21,960 INFO L93 Difference]: Finished difference Result 5136 states and 17042 transitions. [2021-04-15 05:33:21,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:33:21,962 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:21,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:21,973 INFO L225 Difference]: With dead ends: 5136 [2021-04-15 05:33:21,973 INFO L226 Difference]: Without dead ends: 5136 [2021-04-15 05:33:21,973 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:33:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5136 states. [2021-04-15 05:33:22,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5136 to 3266. [2021-04-15 05:33:22,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 3265 states have (on average 3.559571209800919) internal successors, (11622), 3265 states have internal predecessors, (11622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:22,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 11622 transitions. [2021-04-15 05:33:22,050 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 11622 transitions. Word has length 28 [2021-04-15 05:33:22,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:22,050 INFO L480 AbstractCegarLoop]: Abstraction has 3266 states and 11622 transitions. [2021-04-15 05:33:22,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:22,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 11622 transitions. [2021-04-15 05:33:22,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:22,057 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:22,057 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:22,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-04-15 05:33:22,271 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:22,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:22,271 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 67 times [2021-04-15 05:33:22,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:22,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412618388] [2021-04-15 05:33:22,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:22,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412618388] [2021-04-15 05:33:22,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543181927] [2021-04-15 05:33:22,335 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:22,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:22,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:22,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:22,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:33:22,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751456688] [2021-04-15 05:33:22,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:33:22,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:22,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:33:22,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:33:22,524 INFO L87 Difference]: Start difference. First operand 3266 states and 11622 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:23,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:23,681 INFO L93 Difference]: Finished difference Result 7168 states and 22913 transitions. [2021-04-15 05:33:23,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 05:33:23,684 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:23,699 INFO L225 Difference]: With dead ends: 7168 [2021-04-15 05:33:23,700 INFO L226 Difference]: Without dead ends: 7168 [2021-04-15 05:33:23,700 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 710.6ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 05:33:23,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7168 states. [2021-04-15 05:33:23,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7168 to 3296. [2021-04-15 05:33:23,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3296 states, 3295 states have (on average 3.559028831562974) internal successors, (11727), 3295 states have internal predecessors, (11727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:23,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3296 states to 3296 states and 11727 transitions. [2021-04-15 05:33:23,810 INFO L78 Accepts]: Start accepts. Automaton has 3296 states and 11727 transitions. Word has length 28 [2021-04-15 05:33:23,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:23,810 INFO L480 AbstractCegarLoop]: Abstraction has 3296 states and 11727 transitions. [2021-04-15 05:33:23,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:23,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3296 states and 11727 transitions. [2021-04-15 05:33:23,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:23,815 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:23,815 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:24,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:24,016 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:24,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:24,016 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 68 times [2021-04-15 05:33:24,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:24,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724084394] [2021-04-15 05:33:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:24,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724084394] [2021-04-15 05:33:24,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900020493] [2021-04-15 05:33:24,099 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:24,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:33:24,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:24,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:24,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:24,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:24,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:33:24,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881470610] [2021-04-15 05:33:24,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:33:24,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:24,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:33:24,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:33:24,284 INFO L87 Difference]: Start difference. First operand 3296 states and 11727 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:25,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:25,852 INFO L93 Difference]: Finished difference Result 7462 states and 23886 transitions. [2021-04-15 05:33:25,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-04-15 05:33:25,854 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:25,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:25,870 INFO L225 Difference]: With dead ends: 7462 [2021-04-15 05:33:25,870 INFO L226 Difference]: Without dead ends: 7462 [2021-04-15 05:33:25,871 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 845.4ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 05:33:25,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7462 states. [2021-04-15 05:33:25,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7462 to 3426. [2021-04-15 05:33:25,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 3425 states have (on average 3.542773722627737) internal successors, (12134), 3425 states have internal predecessors, (12134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:25,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 12134 transitions. [2021-04-15 05:33:25,967 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 12134 transitions. Word has length 28 [2021-04-15 05:33:25,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:25,967 INFO L480 AbstractCegarLoop]: Abstraction has 3426 states and 12134 transitions. [2021-04-15 05:33:25,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:25,967 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 12134 transitions. [2021-04-15 05:33:25,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:25,973 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:25,973 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:26,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:26,173 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:26,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:26,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 69 times [2021-04-15 05:33:26,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:26,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116430864] [2021-04-15 05:33:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:26,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116430864] [2021-04-15 05:33:26,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631620938] [2021-04-15 05:33:26,245 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:26,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:33:26,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:26,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:33:26,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:26,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:26,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:33:26,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558028744] [2021-04-15 05:33:26,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:33:26,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:26,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:33:26,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:33:26,435 INFO L87 Difference]: Start difference. First operand 3426 states and 12134 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:27,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:27,657 INFO L93 Difference]: Finished difference Result 7933 states and 25424 transitions. [2021-04-15 05:33:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 05:33:27,659 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:27,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:27,676 INFO L225 Difference]: With dead ends: 7933 [2021-04-15 05:33:27,676 INFO L226 Difference]: Without dead ends: 7920 [2021-04-15 05:33:27,677 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 733.7ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 05:33:27,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7920 states. [2021-04-15 05:33:27,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7920 to 4071. [2021-04-15 05:33:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4071 states, 4070 states have (on average 3.5847665847665846) internal successors, (14590), 4070 states have internal predecessors, (14590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:27,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4071 states to 4071 states and 14590 transitions. [2021-04-15 05:33:27,782 INFO L78 Accepts]: Start accepts. Automaton has 4071 states and 14590 transitions. Word has length 28 [2021-04-15 05:33:27,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:27,783 INFO L480 AbstractCegarLoop]: Abstraction has 4071 states and 14590 transitions. [2021-04-15 05:33:27,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:27,783 INFO L276 IsEmpty]: Start isEmpty. Operand 4071 states and 14590 transitions. [2021-04-15 05:33:27,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:27,789 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:27,789 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:27,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:27,990 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:27,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:27,990 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 70 times [2021-04-15 05:33:27,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:27,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563116417] [2021-04-15 05:33:27,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:28,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563116417] [2021-04-15 05:33:28,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134370248] [2021-04-15 05:33:28,057 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:28,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:33:28,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:28,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:33:28,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:28,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:28,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:33:28,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847238800] [2021-04-15 05:33:28,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:33:28,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:28,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:33:28,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:33:28,233 INFO L87 Difference]: Start difference. First operand 4071 states and 14590 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:29,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:29,369 INFO L93 Difference]: Finished difference Result 8195 states and 26154 transitions. [2021-04-15 05:33:29,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 05:33:29,371 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:29,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:29,388 INFO L225 Difference]: With dead ends: 8195 [2021-04-15 05:33:29,388 INFO L226 Difference]: Without dead ends: 8195 [2021-04-15 05:33:29,388 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 675.5ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 05:33:29,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8195 states. [2021-04-15 05:33:29,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8195 to 3824. [2021-04-15 05:33:29,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3824 states, 3823 states have (on average 3.550353125817421) internal successors, (13573), 3823 states have internal predecessors, (13573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:29,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3824 states to 3824 states and 13573 transitions. [2021-04-15 05:33:29,481 INFO L78 Accepts]: Start accepts. Automaton has 3824 states and 13573 transitions. Word has length 28 [2021-04-15 05:33:29,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:29,481 INFO L480 AbstractCegarLoop]: Abstraction has 3824 states and 13573 transitions. [2021-04-15 05:33:29,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:29,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3824 states and 13573 transitions. [2021-04-15 05:33:29,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:29,487 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:29,487 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:29,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable373 [2021-04-15 05:33:29,687 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:29,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:29,688 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 71 times [2021-04-15 05:33:29,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:29,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144037080] [2021-04-15 05:33:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:29,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144037080] [2021-04-15 05:33:29,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486554777] [2021-04-15 05:33:29,750 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:29,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:33:29,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:29,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:29,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:29,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:29,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:33:29,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995171411] [2021-04-15 05:33:29,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:33:29,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:29,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:33:29,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:33:29,920 INFO L87 Difference]: Start difference. First operand 3824 states and 13573 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:31,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:31,322 INFO L93 Difference]: Finished difference Result 7301 states and 23970 transitions. [2021-04-15 05:33:31,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-15 05:33:31,323 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:31,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:31,339 INFO L225 Difference]: With dead ends: 7301 [2021-04-15 05:33:31,339 INFO L226 Difference]: Without dead ends: 7297 [2021-04-15 05:33:31,339 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 781.9ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 05:33:31,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7297 states. [2021-04-15 05:33:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7297 to 3457. [2021-04-15 05:33:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3457 states, 3456 states have (on average 3.595775462962963) internal successors, (12427), 3456 states have internal predecessors, (12427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:31,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3457 states to 3457 states and 12427 transitions. [2021-04-15 05:33:31,434 INFO L78 Accepts]: Start accepts. Automaton has 3457 states and 12427 transitions. Word has length 28 [2021-04-15 05:33:31,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:31,435 INFO L480 AbstractCegarLoop]: Abstraction has 3457 states and 12427 transitions. [2021-04-15 05:33:31,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:31,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3457 states and 12427 transitions. [2021-04-15 05:33:31,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:31,440 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:31,441 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:31,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:31,641 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:31,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:31,641 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 72 times [2021-04-15 05:33:31,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:31,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914122986] [2021-04-15 05:33:31,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:31,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914122986] [2021-04-15 05:33:31,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205544061] [2021-04-15 05:33:31,706 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:31,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:33:31,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:31,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:31,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:31,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:31,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-04-15 05:33:31,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824777051] [2021-04-15 05:33:31,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:33:31,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:31,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:33:31,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:33:31,952 INFO L87 Difference]: Start difference. First operand 3457 states and 12427 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:33,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:33,877 INFO L93 Difference]: Finished difference Result 11600 states and 38331 transitions. [2021-04-15 05:33:33,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-04-15 05:33:33,879 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:33,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:33,906 INFO L225 Difference]: With dead ends: 11600 [2021-04-15 05:33:33,906 INFO L226 Difference]: Without dead ends: 11600 [2021-04-15 05:33:33,907 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 1127.0ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-04-15 05:33:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11600 states. [2021-04-15 05:33:34,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11600 to 3751. [2021-04-15 05:33:34,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3751 states, 3750 states have (on average 3.6784) internal successors, (13794), 3750 states have internal predecessors, (13794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3751 states to 3751 states and 13794 transitions. [2021-04-15 05:33:34,051 INFO L78 Accepts]: Start accepts. Automaton has 3751 states and 13794 transitions. Word has length 28 [2021-04-15 05:33:34,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:34,051 INFO L480 AbstractCegarLoop]: Abstraction has 3751 states and 13794 transitions. [2021-04-15 05:33:34,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:34,051 INFO L276 IsEmpty]: Start isEmpty. Operand 3751 states and 13794 transitions. [2021-04-15 05:33:34,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:34,058 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:34,058 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:34,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-04-15 05:33:34,258 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:34,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:34,259 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 73 times [2021-04-15 05:33:34,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:34,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710387109] [2021-04-15 05:33:34,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:34,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710387109] [2021-04-15 05:33:34,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786336821] [2021-04-15 05:33:34,354 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:34,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:34,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:34,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:34,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-04-15 05:33:34,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681007920] [2021-04-15 05:33:34,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:33:34,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:34,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:33:34,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:33:34,592 INFO L87 Difference]: Start difference. First operand 3751 states and 13794 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:36,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:36,755 INFO L93 Difference]: Finished difference Result 11294 states and 37514 transitions. [2021-04-15 05:33:36,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-04-15 05:33:36,757 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:36,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:36,783 INFO L225 Difference]: With dead ends: 11294 [2021-04-15 05:33:36,783 INFO L226 Difference]: Without dead ends: 11294 [2021-04-15 05:33:36,784 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 1258.1ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-04-15 05:33:36,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11294 states. [2021-04-15 05:33:36,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11294 to 3699. [2021-04-15 05:33:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3699 states, 3698 states have (on average 3.657382368848026) internal successors, (13525), 3698 states have internal predecessors, (13525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:36,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 13525 transitions. [2021-04-15 05:33:36,920 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 13525 transitions. Word has length 28 [2021-04-15 05:33:36,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:36,920 INFO L480 AbstractCegarLoop]: Abstraction has 3699 states and 13525 transitions. [2021-04-15 05:33:36,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:36,920 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 13525 transitions. [2021-04-15 05:33:36,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:36,952 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:36,952 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:37,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable376,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:37,152 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:37,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:37,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 74 times [2021-04-15 05:33:37,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:37,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305652678] [2021-04-15 05:33:37,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:37,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305652678] [2021-04-15 05:33:37,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218159297] [2021-04-15 05:33:37,224 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:37,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:33:37,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:37,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:37,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:37,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:37,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-04-15 05:33:37,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907055170] [2021-04-15 05:33:37,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:33:37,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:37,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:33:37,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:33:37,440 INFO L87 Difference]: Start difference. First operand 3699 states and 13525 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:39,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:39,259 INFO L93 Difference]: Finished difference Result 10614 states and 34080 transitions. [2021-04-15 05:33:39,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-04-15 05:33:39,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:39,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:39,283 INFO L225 Difference]: With dead ends: 10614 [2021-04-15 05:33:39,283 INFO L226 Difference]: Without dead ends: 10614 [2021-04-15 05:33:39,284 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 981.1ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 05:33:39,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10614 states. [2021-04-15 05:33:39,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10614 to 3739. [2021-04-15 05:33:39,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 3738 states have (on average 3.6615837346174427) internal successors, (13687), 3738 states have internal predecessors, (13687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:39,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 13687 transitions. [2021-04-15 05:33:39,416 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 13687 transitions. Word has length 28 [2021-04-15 05:33:39,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:39,416 INFO L480 AbstractCegarLoop]: Abstraction has 3739 states and 13687 transitions. [2021-04-15 05:33:39,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:39,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 13687 transitions. [2021-04-15 05:33:39,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:39,423 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:39,423 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:39,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-04-15 05:33:39,623 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:39,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:39,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 75 times [2021-04-15 05:33:39,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:39,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232399101] [2021-04-15 05:33:39,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:39,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232399101] [2021-04-15 05:33:39,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145853633] [2021-04-15 05:33:39,688 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:39,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 05:33:39,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:39,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:39,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:39,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:39,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-04-15 05:33:39,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546170718] [2021-04-15 05:33:39,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:33:39,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:39,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:33:39,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:33:39,906 INFO L87 Difference]: Start difference. First operand 3739 states and 13687 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:41,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:41,610 INFO L93 Difference]: Finished difference Result 10000 states and 32572 transitions. [2021-04-15 05:33:41,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-04-15 05:33:41,612 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:41,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:41,633 INFO L225 Difference]: With dead ends: 10000 [2021-04-15 05:33:41,633 INFO L226 Difference]: Without dead ends: 9992 [2021-04-15 05:33:41,634 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 909.4ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 05:33:41,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9992 states. [2021-04-15 05:33:41,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9992 to 3705. [2021-04-15 05:33:41,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3705 states, 3704 states have (on average 3.6565874730021597) internal successors, (13544), 3704 states have internal predecessors, (13544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:41,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 13544 transitions. [2021-04-15 05:33:41,761 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 13544 transitions. Word has length 28 [2021-04-15 05:33:41,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:41,761 INFO L480 AbstractCegarLoop]: Abstraction has 3705 states and 13544 transitions. [2021-04-15 05:33:41,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:41,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 13544 transitions. [2021-04-15 05:33:41,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:41,767 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:41,767 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:41,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-04-15 05:33:41,968 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:41,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:41,968 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 76 times [2021-04-15 05:33:41,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:41,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633342387] [2021-04-15 05:33:41,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:42,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633342387] [2021-04-15 05:33:42,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859890447] [2021-04-15 05:33:42,032 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:42,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:33:42,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:42,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:42,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:42,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:42,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-04-15 05:33:42,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032425611] [2021-04-15 05:33:42,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:33:42,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:42,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:33:42,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:33:42,250 INFO L87 Difference]: Start difference. First operand 3705 states and 13544 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:43,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:43,968 INFO L93 Difference]: Finished difference Result 9602 states and 31462 transitions. [2021-04-15 05:33:43,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-04-15 05:33:43,969 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:43,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:43,991 INFO L225 Difference]: With dead ends: 9602 [2021-04-15 05:33:43,991 INFO L226 Difference]: Without dead ends: 9602 [2021-04-15 05:33:43,991 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 983.6ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 05:33:44,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9602 states. [2021-04-15 05:33:44,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9602 to 3721. [2021-04-15 05:33:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3721 states, 3720 states have (on average 3.6580645161290324) internal successors, (13608), 3720 states have internal predecessors, (13608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:44,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 13608 transitions. [2021-04-15 05:33:44,116 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 13608 transitions. Word has length 28 [2021-04-15 05:33:44,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:44,116 INFO L480 AbstractCegarLoop]: Abstraction has 3721 states and 13608 transitions. [2021-04-15 05:33:44,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:44,116 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 13608 transitions. [2021-04-15 05:33:44,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:44,122 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:44,122 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:44,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:44,323 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:44,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:44,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 77 times [2021-04-15 05:33:44,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:44,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344298143] [2021-04-15 05:33:44,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:44,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344298143] [2021-04-15 05:33:44,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693432755] [2021-04-15 05:33:44,387 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:44,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 05:33:44,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:44,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:44,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:44,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:44,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-04-15 05:33:44,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481252842] [2021-04-15 05:33:44,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:33:44,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:44,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:33:44,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:33:44,604 INFO L87 Difference]: Start difference. First operand 3721 states and 13608 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:46,353 INFO L93 Difference]: Finished difference Result 9267 states and 30667 transitions. [2021-04-15 05:33:46,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-04-15 05:33:46,355 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:46,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:46,376 INFO L225 Difference]: With dead ends: 9267 [2021-04-15 05:33:46,376 INFO L226 Difference]: Without dead ends: 9259 [2021-04-15 05:33:46,377 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 974.0ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 05:33:46,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9259 states. [2021-04-15 05:33:46,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9259 to 3389. [2021-04-15 05:33:46,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3389 states, 3388 states have (on average 3.5714285714285716) internal successors, (12100), 3388 states have internal predecessors, (12100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:46,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3389 states to 3389 states and 12100 transitions. [2021-04-15 05:33:46,492 INFO L78 Accepts]: Start accepts. Automaton has 3389 states and 12100 transitions. Word has length 28 [2021-04-15 05:33:46,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:46,492 INFO L480 AbstractCegarLoop]: Abstraction has 3389 states and 12100 transitions. [2021-04-15 05:33:46,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:46,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3389 states and 12100 transitions. [2021-04-15 05:33:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:46,498 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:46,498 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:46,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-04-15 05:33:46,699 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:46,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:46,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 78 times [2021-04-15 05:33:46,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:46,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333803389] [2021-04-15 05:33:46,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:46,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333803389] [2021-04-15 05:33:46,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789853281] [2021-04-15 05:33:46,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:46,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 05:33:46,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:46,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:46,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:46,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:46,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-04-15 05:33:46,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131245325] [2021-04-15 05:33:46,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:33:46,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:46,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:33:46,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:33:46,995 INFO L87 Difference]: Start difference. First operand 3389 states and 12100 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:48,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:48,666 INFO L93 Difference]: Finished difference Result 7033 states and 23007 transitions. [2021-04-15 05:33:48,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-04-15 05:33:48,668 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:48,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:48,683 INFO L225 Difference]: With dead ends: 7033 [2021-04-15 05:33:48,683 INFO L226 Difference]: Without dead ends: 7033 [2021-04-15 05:33:48,683 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 988.8ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 05:33:48,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7033 states. [2021-04-15 05:33:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7033 to 3401. [2021-04-15 05:33:48,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3401 states, 3400 states have (on average 3.57) internal successors, (12138), 3400 states have internal predecessors, (12138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:48,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 12138 transitions. [2021-04-15 05:33:48,768 INFO L78 Accepts]: Start accepts. Automaton has 3401 states and 12138 transitions. Word has length 28 [2021-04-15 05:33:48,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:48,768 INFO L480 AbstractCegarLoop]: Abstraction has 3401 states and 12138 transitions. [2021-04-15 05:33:48,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:48,768 INFO L276 IsEmpty]: Start isEmpty. Operand 3401 states and 12138 transitions. [2021-04-15 05:33:48,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:48,774 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:48,774 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:48,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:48,974 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:48,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:48,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 79 times [2021-04-15 05:33:48,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:48,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496903896] [2021-04-15 05:33:48,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:49,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496903896] [2021-04-15 05:33:49,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349921881] [2021-04-15 05:33:49,041 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:49,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:49,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:49,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:49,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 05:33:49,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082586549] [2021-04-15 05:33:49,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:33:49,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:49,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:33:49,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:33:49,292 INFO L87 Difference]: Start difference. First operand 3401 states and 12138 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:51,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:51,413 INFO L93 Difference]: Finished difference Result 7961 states and 25396 transitions. [2021-04-15 05:33:51,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-04-15 05:33:51,415 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:51,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:51,431 INFO L225 Difference]: With dead ends: 7961 [2021-04-15 05:33:51,432 INFO L226 Difference]: Without dead ends: 7961 [2021-04-15 05:33:51,432 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 1330.2ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-04-15 05:33:51,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7961 states. [2021-04-15 05:33:51,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7961 to 3467. [2021-04-15 05:33:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3467 states, 3466 states have (on average 3.5646278130409694) internal successors, (12355), 3466 states have internal predecessors, (12355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:51,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3467 states to 3467 states and 12355 transitions. [2021-04-15 05:33:51,528 INFO L78 Accepts]: Start accepts. Automaton has 3467 states and 12355 transitions. Word has length 28 [2021-04-15 05:33:51,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:51,528 INFO L480 AbstractCegarLoop]: Abstraction has 3467 states and 12355 transitions. [2021-04-15 05:33:51,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:51,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3467 states and 12355 transitions. [2021-04-15 05:33:51,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:51,533 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:51,533 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:51,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:51,734 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:51,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:51,734 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 80 times [2021-04-15 05:33:51,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:51,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196221487] [2021-04-15 05:33:51,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:51,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196221487] [2021-04-15 05:33:51,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874672101] [2021-04-15 05:33:51,816 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:51,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:33:51,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:51,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:51,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:52,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:52,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 05:33:52,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88404337] [2021-04-15 05:33:52,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:33:52,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:52,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:33:52,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:33:52,063 INFO L87 Difference]: Start difference. First operand 3467 states and 12355 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:53,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:53,998 INFO L93 Difference]: Finished difference Result 7344 states and 23768 transitions. [2021-04-15 05:33:53,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-04-15 05:33:53,999 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:53,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:54,012 INFO L225 Difference]: With dead ends: 7344 [2021-04-15 05:33:54,012 INFO L226 Difference]: Without dead ends: 7340 [2021-04-15 05:33:54,012 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 1214.6ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-04-15 05:33:54,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7340 states. [2021-04-15 05:33:54,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7340 to 3402. [2021-04-15 05:33:54,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 3.5624816230520433) internal successors, (12116), 3401 states have internal predecessors, (12116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:54,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 12116 transitions. [2021-04-15 05:33:54,092 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 12116 transitions. Word has length 28 [2021-04-15 05:33:54,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:54,092 INFO L480 AbstractCegarLoop]: Abstraction has 3402 states and 12116 transitions. [2021-04-15 05:33:54,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:54,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 12116 transitions. [2021-04-15 05:33:54,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:54,097 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:54,097 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:54,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:54,298 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:54,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:54,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 68 times [2021-04-15 05:33:54,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:54,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974236814] [2021-04-15 05:33:54,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:54,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974236814] [2021-04-15 05:33:54,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165532437] [2021-04-15 05:33:54,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:54,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:33:54,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:54,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:54,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:54,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:54,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-04-15 05:33:54,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70016676] [2021-04-15 05:33:54,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:33:54,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:54,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:33:54,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:33:54,593 INFO L87 Difference]: Start difference. First operand 3402 states and 12116 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:55,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:55,744 INFO L93 Difference]: Finished difference Result 6487 states and 21356 transitions. [2021-04-15 05:33:55,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 05:33:55,744 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:55,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:55,758 INFO L225 Difference]: With dead ends: 6487 [2021-04-15 05:33:55,758 INFO L226 Difference]: Without dead ends: 6487 [2021-04-15 05:33:55,758 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 664.6ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 05:33:55,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6487 states. [2021-04-15 05:33:55,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6487 to 3406. [2021-04-15 05:33:55,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3405 states have (on average 3.5641703377386196) internal successors, (12136), 3405 states have internal predecessors, (12136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:55,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 12136 transitions. [2021-04-15 05:33:55,836 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 12136 transitions. Word has length 28 [2021-04-15 05:33:55,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:55,836 INFO L480 AbstractCegarLoop]: Abstraction has 3406 states and 12136 transitions. [2021-04-15 05:33:55,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:55,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 12136 transitions. [2021-04-15 05:33:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:55,842 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:55,842 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:56,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:56,042 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:56,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:56,043 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 69 times [2021-04-15 05:33:56,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:56,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479694625] [2021-04-15 05:33:56,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:56,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479694625] [2021-04-15 05:33:56,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552793944] [2021-04-15 05:33:56,127 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:56,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:33:56,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:56,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:56,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:56,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:56,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-04-15 05:33:56,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496722416] [2021-04-15 05:33:56,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:33:56,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:56,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:33:56,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:33:56,342 INFO L87 Difference]: Start difference. First operand 3406 states and 12136 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:57,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:33:57,902 INFO L93 Difference]: Finished difference Result 6961 states and 22678 transitions. [2021-04-15 05:33:57,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 05:33:57,904 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:33:57,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:33:57,918 INFO L225 Difference]: With dead ends: 6961 [2021-04-15 05:33:57,918 INFO L226 Difference]: Without dead ends: 6961 [2021-04-15 05:33:57,919 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 928.2ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 05:33:57,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6961 states. [2021-04-15 05:33:57,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6961 to 3420. [2021-04-15 05:33:57,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 3.5615677098566834) internal successors, (12177), 3419 states have internal predecessors, (12177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:58,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 12177 transitions. [2021-04-15 05:33:58,007 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 12177 transitions. Word has length 28 [2021-04-15 05:33:58,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:33:58,008 INFO L480 AbstractCegarLoop]: Abstraction has 3420 states and 12177 transitions. [2021-04-15 05:33:58,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:33:58,008 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 12177 transitions. [2021-04-15 05:33:58,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:33:58,015 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:33:58,015 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:33:58,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-04-15 05:33:58,216 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:33:58,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:33:58,216 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 70 times [2021-04-15 05:33:58,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:33:58,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853069111] [2021-04-15 05:33:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:33:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:33:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:58,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853069111] [2021-04-15 05:33:58,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109207972] [2021-04-15 05:33:58,298 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:33:58,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:33:58,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:33:58,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:33:58,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:33:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:33:58,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:33:58,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-04-15 05:33:58,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962538532] [2021-04-15 05:33:58,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:33:58,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:33:58,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:33:58,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:33:58,511 INFO L87 Difference]: Start difference. First operand 3420 states and 12177 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:00,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:00,244 INFO L93 Difference]: Finished difference Result 7467 states and 24110 transitions. [2021-04-15 05:34:00,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-04-15 05:34:00,246 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:00,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:00,262 INFO L225 Difference]: With dead ends: 7467 [2021-04-15 05:34:00,262 INFO L226 Difference]: Without dead ends: 7467 [2021-04-15 05:34:00,263 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 1029.5ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 05:34:00,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7467 states. [2021-04-15 05:34:00,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7467 to 3500. [2021-04-15 05:34:00,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3500 states, 3499 states have (on average 3.5550157187767932) internal successors, (12439), 3499 states have internal predecessors, (12439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:00,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3500 states to 3500 states and 12439 transitions. [2021-04-15 05:34:00,361 INFO L78 Accepts]: Start accepts. Automaton has 3500 states and 12439 transitions. Word has length 28 [2021-04-15 05:34:00,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:00,361 INFO L480 AbstractCegarLoop]: Abstraction has 3500 states and 12439 transitions. [2021-04-15 05:34:00,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:00,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3500 states and 12439 transitions. [2021-04-15 05:34:00,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:00,367 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:00,367 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:00,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-04-15 05:34:00,567 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:00,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:00,568 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 71 times [2021-04-15 05:34:00,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:00,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304479758] [2021-04-15 05:34:00,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:00,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304479758] [2021-04-15 05:34:00,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665434124] [2021-04-15 05:34:00,656 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:00,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:34:00,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:00,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:34:00,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:00,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:00,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-04-15 05:34:00,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881829872] [2021-04-15 05:34:00,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:34:00,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:00,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:34:00,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:34:00,915 INFO L87 Difference]: Start difference. First operand 3500 states and 12439 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:02,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:02,155 INFO L93 Difference]: Finished difference Result 7330 states and 25046 transitions. [2021-04-15 05:34:02,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 05:34:02,158 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:02,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:02,174 INFO L225 Difference]: With dead ends: 7330 [2021-04-15 05:34:02,174 INFO L226 Difference]: Without dead ends: 7330 [2021-04-15 05:34:02,175 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 838.0ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 05:34:02,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7330 states. [2021-04-15 05:34:02,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7330 to 4678. [2021-04-15 05:34:02,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 3.6730810348514003) internal successors, (17179), 4677 states have internal predecessors, (17179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:02,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 17179 transitions. [2021-04-15 05:34:02,322 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 17179 transitions. Word has length 28 [2021-04-15 05:34:02,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:02,323 INFO L480 AbstractCegarLoop]: Abstraction has 4678 states and 17179 transitions. [2021-04-15 05:34:02,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 17179 transitions. [2021-04-15 05:34:02,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:02,331 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:02,331 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:02,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-04-15 05:34:02,531 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:02,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:02,532 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 72 times [2021-04-15 05:34:02,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:02,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606170167] [2021-04-15 05:34:02,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:02,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606170167] [2021-04-15 05:34:02,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174004391] [2021-04-15 05:34:02,614 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:02,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 05:34:02,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:02,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:34:02,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:02,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:02,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-04-15 05:34:02,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561182794] [2021-04-15 05:34:02,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:34:02,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:02,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:34:02,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:34:02,810 INFO L87 Difference]: Start difference. First operand 4678 states and 17179 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:04,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:04,411 INFO L93 Difference]: Finished difference Result 8463 states and 28955 transitions. [2021-04-15 05:34:04,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-04-15 05:34:04,412 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:04,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:04,428 INFO L225 Difference]: With dead ends: 8463 [2021-04-15 05:34:04,429 INFO L226 Difference]: Without dead ends: 8459 [2021-04-15 05:34:04,429 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 930.3ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 05:34:04,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8459 states. [2021-04-15 05:34:04,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8459 to 4570. [2021-04-15 05:34:04,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4569 states have (on average 3.683738235937842) internal successors, (16831), 4569 states have internal predecessors, (16831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:04,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 16831 transitions. [2021-04-15 05:34:04,542 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 16831 transitions. Word has length 28 [2021-04-15 05:34:04,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:04,542 INFO L480 AbstractCegarLoop]: Abstraction has 4570 states and 16831 transitions. [2021-04-15 05:34:04,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:04,543 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 16831 transitions. [2021-04-15 05:34:04,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:04,551 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:04,551 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:04,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-04-15 05:34:04,752 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:04,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:04,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 81 times [2021-04-15 05:34:04,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:04,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856814906] [2021-04-15 05:34:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:04,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856814906] [2021-04-15 05:34:04,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402884222] [2021-04-15 05:34:04,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:04,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:34:04,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:04,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:34:04,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:05,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:05,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-04-15 05:34:05,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222396633] [2021-04-15 05:34:05,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:34:05,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:05,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:34:05,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:34:05,037 INFO L87 Difference]: Start difference. First operand 4570 states and 16831 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:06,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:06,804 INFO L93 Difference]: Finished difference Result 9645 states and 32628 transitions. [2021-04-15 05:34:06,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 05:34:06,806 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:06,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:06,829 INFO L225 Difference]: With dead ends: 9645 [2021-04-15 05:34:06,829 INFO L226 Difference]: Without dead ends: 9633 [2021-04-15 05:34:06,829 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1005.3ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:34:06,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9633 states. [2021-04-15 05:34:06,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9633 to 5049. [2021-04-15 05:34:06,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5049 states, 5048 states have (on average 3.7652535657686212) internal successors, (19007), 5048 states have internal predecessors, (19007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:06,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5049 states to 5049 states and 19007 transitions. [2021-04-15 05:34:06,964 INFO L78 Accepts]: Start accepts. Automaton has 5049 states and 19007 transitions. Word has length 28 [2021-04-15 05:34:06,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:06,964 INFO L480 AbstractCegarLoop]: Abstraction has 5049 states and 19007 transitions. [2021-04-15 05:34:06,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:06,964 INFO L276 IsEmpty]: Start isEmpty. Operand 5049 states and 19007 transitions. [2021-04-15 05:34:06,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:06,973 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:06,973 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:07,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-04-15 05:34:07,174 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:07,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:07,174 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 82 times [2021-04-15 05:34:07,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:07,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849680178] [2021-04-15 05:34:07,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:07,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849680178] [2021-04-15 05:34:07,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273234671] [2021-04-15 05:34:07,233 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:07,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:34:07,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:07,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:34:07,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:07,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:07,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-04-15 05:34:07,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195877937] [2021-04-15 05:34:07,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:34:07,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:07,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:34:07,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:34:07,466 INFO L87 Difference]: Start difference. First operand 5049 states and 19007 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:09,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:09,242 INFO L93 Difference]: Finished difference Result 9975 states and 33666 transitions. [2021-04-15 05:34:09,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 05:34:09,244 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:09,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:09,266 INFO L225 Difference]: With dead ends: 9975 [2021-04-15 05:34:09,266 INFO L226 Difference]: Without dead ends: 9975 [2021-04-15 05:34:09,266 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1036.5ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:34:09,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9975 states. [2021-04-15 05:34:09,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9975 to 5068. [2021-04-15 05:34:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5068 states, 5067 states have (on average 3.7499506611407143) internal successors, (19001), 5067 states have internal predecessors, (19001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:09,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5068 states to 5068 states and 19001 transitions. [2021-04-15 05:34:09,396 INFO L78 Accepts]: Start accepts. Automaton has 5068 states and 19001 transitions. Word has length 28 [2021-04-15 05:34:09,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:09,396 INFO L480 AbstractCegarLoop]: Abstraction has 5068 states and 19001 transitions. [2021-04-15 05:34:09,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:09,396 INFO L276 IsEmpty]: Start isEmpty. Operand 5068 states and 19001 transitions. [2021-04-15 05:34:09,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:09,405 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:09,405 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:09,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-04-15 05:34:09,605 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:09,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:09,606 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 83 times [2021-04-15 05:34:09,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:09,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359778286] [2021-04-15 05:34:09,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:09,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359778286] [2021-04-15 05:34:09,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146160263] [2021-04-15 05:34:09,673 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:09,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:34:09,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:09,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:34:09,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:09,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:09,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-04-15 05:34:09,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116050869] [2021-04-15 05:34:09,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:34:09,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:09,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:34:09,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:34:09,865 INFO L87 Difference]: Start difference. First operand 5068 states and 19001 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:10,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:10,853 INFO L93 Difference]: Finished difference Result 9405 states and 33542 transitions. [2021-04-15 05:34:10,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 05:34:10,855 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:10,877 INFO L225 Difference]: With dead ends: 9405 [2021-04-15 05:34:10,877 INFO L226 Difference]: Without dead ends: 9322 [2021-04-15 05:34:10,878 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 496.4ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 05:34:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9322 states. [2021-04-15 05:34:10,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9322 to 6492. [2021-04-15 05:34:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6492 states, 6491 states have (on average 3.795717146818672) internal successors, (24638), 6491 states have internal predecessors, (24638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6492 states to 6492 states and 24638 transitions. [2021-04-15 05:34:11,027 INFO L78 Accepts]: Start accepts. Automaton has 6492 states and 24638 transitions. Word has length 28 [2021-04-15 05:34:11,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:11,027 INFO L480 AbstractCegarLoop]: Abstraction has 6492 states and 24638 transitions. [2021-04-15 05:34:11,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:11,028 INFO L276 IsEmpty]: Start isEmpty. Operand 6492 states and 24638 transitions. [2021-04-15 05:34:11,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:11,041 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:11,041 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:11,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:11,241 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:11,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:11,242 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 84 times [2021-04-15 05:34:11,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:11,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707868367] [2021-04-15 05:34:11,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:11,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707868367] [2021-04-15 05:34:11,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857598424] [2021-04-15 05:34:11,314 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:11,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:34:11,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:11,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:34:11,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:11,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:11,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-04-15 05:34:11,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619505740] [2021-04-15 05:34:11,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:34:11,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:11,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:34:11,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:34:11,482 INFO L87 Difference]: Start difference. First operand 6492 states and 24638 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:11,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:11,844 INFO L93 Difference]: Finished difference Result 8975 states and 31868 transitions. [2021-04-15 05:34:11,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 05:34:11,846 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:11,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:11,866 INFO L225 Difference]: With dead ends: 8975 [2021-04-15 05:34:11,867 INFO L226 Difference]: Without dead ends: 8975 [2021-04-15 05:34:11,867 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:34:11,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8975 states. [2021-04-15 05:34:11,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8975 to 6570. [2021-04-15 05:34:11,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6570 states, 6569 states have (on average 3.777896179022682) internal successors, (24817), 6569 states have internal predecessors, (24817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:12,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6570 states to 6570 states and 24817 transitions. [2021-04-15 05:34:12,007 INFO L78 Accepts]: Start accepts. Automaton has 6570 states and 24817 transitions. Word has length 28 [2021-04-15 05:34:12,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:12,007 INFO L480 AbstractCegarLoop]: Abstraction has 6570 states and 24817 transitions. [2021-04-15 05:34:12,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:12,008 INFO L276 IsEmpty]: Start isEmpty. Operand 6570 states and 24817 transitions. [2021-04-15 05:34:12,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:12,020 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:12,020 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:12,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:12,221 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:12,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:12,221 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 85 times [2021-04-15 05:34:12,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:12,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849083734] [2021-04-15 05:34:12,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:12,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849083734] [2021-04-15 05:34:12,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897042301] [2021-04-15 05:34:12,304 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:12,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:34:12,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:12,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:12,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-04-15 05:34:12,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163347666] [2021-04-15 05:34:12,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:34:12,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:12,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:34:12,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:34:12,493 INFO L87 Difference]: Start difference. First operand 6570 states and 24817 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:13,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:13,968 INFO L93 Difference]: Finished difference Result 13578 states and 47526 transitions. [2021-04-15 05:34:13,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-15 05:34:13,970 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:13,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:13,999 INFO L225 Difference]: With dead ends: 13578 [2021-04-15 05:34:13,999 INFO L226 Difference]: Without dead ends: 13578 [2021-04-15 05:34:13,999 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 875.2ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 05:34:14,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13578 states. [2021-04-15 05:34:14,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13578 to 7315. [2021-04-15 05:34:14,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7315 states, 7314 states have (on average 3.7873940388296417) internal successors, (27701), 7314 states have internal predecessors, (27701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:14,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 27701 transitions. [2021-04-15 05:34:14,189 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 27701 transitions. Word has length 28 [2021-04-15 05:34:14,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:14,190 INFO L480 AbstractCegarLoop]: Abstraction has 7315 states and 27701 transitions. [2021-04-15 05:34:14,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:14,190 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 27701 transitions. [2021-04-15 05:34:14,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:14,203 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:14,203 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:14,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:14,403 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:14,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 86 times [2021-04-15 05:34:14,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:14,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430966860] [2021-04-15 05:34:14,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:14,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430966860] [2021-04-15 05:34:14,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077062393] [2021-04-15 05:34:14,475 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:14,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:34:14,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:14,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:34:14,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:14,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:14,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-04-15 05:34:14,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080191056] [2021-04-15 05:34:14,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:34:14,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:14,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:34:14,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:34:14,667 INFO L87 Difference]: Start difference. First operand 7315 states and 27701 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:16,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:16,023 INFO L93 Difference]: Finished difference Result 13779 states and 48245 transitions. [2021-04-15 05:34:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 05:34:16,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:16,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:16,058 INFO L225 Difference]: With dead ends: 13779 [2021-04-15 05:34:16,058 INFO L226 Difference]: Without dead ends: 13779 [2021-04-15 05:34:16,059 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 775.5ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 05:34:16,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13779 states. [2021-04-15 05:34:16,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13779 to 7585. [2021-04-15 05:34:16,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7585 states, 7584 states have (on average 3.7655590717299576) internal successors, (28558), 7584 states have internal predecessors, (28558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:16,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7585 states to 7585 states and 28558 transitions. [2021-04-15 05:34:16,263 INFO L78 Accepts]: Start accepts. Automaton has 7585 states and 28558 transitions. Word has length 28 [2021-04-15 05:34:16,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:16,263 INFO L480 AbstractCegarLoop]: Abstraction has 7585 states and 28558 transitions. [2021-04-15 05:34:16,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:16,263 INFO L276 IsEmpty]: Start isEmpty. Operand 7585 states and 28558 transitions. [2021-04-15 05:34:16,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:16,276 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:16,276 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:16,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:16,477 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:16,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:16,477 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 87 times [2021-04-15 05:34:16,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:16,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325974570] [2021-04-15 05:34:16,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:16,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325974570] [2021-04-15 05:34:16,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219673880] [2021-04-15 05:34:16,535 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:16,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:34:16,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:16,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:34:16,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:16,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:16,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:34:16,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034060008] [2021-04-15 05:34:16,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:34:16,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:16,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:34:16,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:34:16,711 INFO L87 Difference]: Start difference. First operand 7585 states and 28558 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:17,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:17,477 INFO L93 Difference]: Finished difference Result 10144 states and 36719 transitions. [2021-04-15 05:34:17,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:34:17,480 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:17,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:17,502 INFO L225 Difference]: With dead ends: 10144 [2021-04-15 05:34:17,503 INFO L226 Difference]: Without dead ends: 10114 [2021-04-15 05:34:17,503 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 392.0ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:34:17,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10114 states. [2021-04-15 05:34:17,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10114 to 8411. [2021-04-15 05:34:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8411 states, 8410 states have (on average 3.7869203329369796) internal successors, (31848), 8410 states have internal predecessors, (31848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8411 states to 8411 states and 31848 transitions. [2021-04-15 05:34:17,703 INFO L78 Accepts]: Start accepts. Automaton has 8411 states and 31848 transitions. Word has length 28 [2021-04-15 05:34:17,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:17,703 INFO L480 AbstractCegarLoop]: Abstraction has 8411 states and 31848 transitions. [2021-04-15 05:34:17,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:17,703 INFO L276 IsEmpty]: Start isEmpty. Operand 8411 states and 31848 transitions. [2021-04-15 05:34:17,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:17,717 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:17,717 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:17,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:17,918 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:17,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:17,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 88 times [2021-04-15 05:34:17,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:17,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367766249] [2021-04-15 05:34:17,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:17,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367766249] [2021-04-15 05:34:17,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143046645] [2021-04-15 05:34:17,975 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:17,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:34:17,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:17,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:34:17,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:18,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:18,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:34:18,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924751795] [2021-04-15 05:34:18,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:34:18,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:18,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:34:18,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:34:18,155 INFO L87 Difference]: Start difference. First operand 8411 states and 31848 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:18,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:18,866 INFO L93 Difference]: Finished difference Result 10709 states and 38590 transitions. [2021-04-15 05:34:18,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:34:18,868 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:18,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:18,890 INFO L225 Difference]: With dead ends: 10709 [2021-04-15 05:34:18,891 INFO L226 Difference]: Without dead ends: 10709 [2021-04-15 05:34:18,891 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 402.9ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:34:18,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10709 states. [2021-04-15 05:34:19,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10709 to 8451. [2021-04-15 05:34:19,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8451 states, 8450 states have (on average 3.7830769230769232) internal successors, (31967), 8450 states have internal predecessors, (31967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:19,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8451 states to 8451 states and 31967 transitions. [2021-04-15 05:34:19,064 INFO L78 Accepts]: Start accepts. Automaton has 8451 states and 31967 transitions. Word has length 28 [2021-04-15 05:34:19,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:19,064 INFO L480 AbstractCegarLoop]: Abstraction has 8451 states and 31967 transitions. [2021-04-15 05:34:19,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:19,064 INFO L276 IsEmpty]: Start isEmpty. Operand 8451 states and 31967 transitions. [2021-04-15 05:34:19,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:19,078 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:19,078 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:19,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:19,279 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:19,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:19,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 89 times [2021-04-15 05:34:19,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:19,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367577760] [2021-04-15 05:34:19,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:19,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367577760] [2021-04-15 05:34:19,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311190907] [2021-04-15 05:34:19,405 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:19,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:34:19,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:19,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:34:19,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:19,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:19,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-04-15 05:34:19,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349543302] [2021-04-15 05:34:19,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:34:19,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:19,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:34:19,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:34:19,573 INFO L87 Difference]: Start difference. First operand 8451 states and 31967 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:20,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:20,767 INFO L93 Difference]: Finished difference Result 14453 states and 51485 transitions. [2021-04-15 05:34:20,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 05:34:20,769 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:20,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:20,804 INFO L225 Difference]: With dead ends: 14453 [2021-04-15 05:34:20,804 INFO L226 Difference]: Without dead ends: 14449 [2021-04-15 05:34:20,804 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 734.3ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 05:34:20,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14449 states. [2021-04-15 05:34:20,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14449 to 8349. [2021-04-15 05:34:21,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8349 states, 8348 states have (on average 3.7870148538572113) internal successors, (31614), 8348 states have internal predecessors, (31614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8349 states to 8349 states and 31614 transitions. [2021-04-15 05:34:21,029 INFO L78 Accepts]: Start accepts. Automaton has 8349 states and 31614 transitions. Word has length 28 [2021-04-15 05:34:21,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:21,030 INFO L480 AbstractCegarLoop]: Abstraction has 8349 states and 31614 transitions. [2021-04-15 05:34:21,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:21,030 INFO L276 IsEmpty]: Start isEmpty. Operand 8349 states and 31614 transitions. [2021-04-15 05:34:21,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:21,044 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:21,045 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:21,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:21,245 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:21,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:21,246 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 90 times [2021-04-15 05:34:21,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:21,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538554104] [2021-04-15 05:34:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:21,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538554104] [2021-04-15 05:34:21,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101742288] [2021-04-15 05:34:21,313 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:21,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:34:21,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:21,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:34:21,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:21,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:21,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-04-15 05:34:21,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900232969] [2021-04-15 05:34:21,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:34:21,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:21,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:34:21,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:34:21,514 INFO L87 Difference]: Start difference. First operand 8349 states and 31614 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:22,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:22,414 INFO L93 Difference]: Finished difference Result 10938 states and 39433 transitions. [2021-04-15 05:34:22,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:34:22,417 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:22,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:22,442 INFO L225 Difference]: With dead ends: 10938 [2021-04-15 05:34:22,442 INFO L226 Difference]: Without dead ends: 10938 [2021-04-15 05:34:22,442 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 510.4ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 05:34:22,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10938 states. [2021-04-15 05:34:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10938 to 8295. [2021-04-15 05:34:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8295 states, 8294 states have (on average 3.780564263322884) internal successors, (31356), 8294 states have internal predecessors, (31356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8295 states to 8295 states and 31356 transitions. [2021-04-15 05:34:22,626 INFO L78 Accepts]: Start accepts. Automaton has 8295 states and 31356 transitions. Word has length 28 [2021-04-15 05:34:22,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:22,627 INFO L480 AbstractCegarLoop]: Abstraction has 8295 states and 31356 transitions. [2021-04-15 05:34:22,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 8295 states and 31356 transitions. [2021-04-15 05:34:22,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:22,644 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:22,644 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:22,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-04-15 05:34:22,845 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:22,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 91 times [2021-04-15 05:34:22,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:22,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663627681] [2021-04-15 05:34:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:22,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663627681] [2021-04-15 05:34:22,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336419940] [2021-04-15 05:34:22,931 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:22,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:34:22,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:23,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:23,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-04-15 05:34:23,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473431757] [2021-04-15 05:34:23,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:34:23,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:23,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:34:23,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:34:23,107 INFO L87 Difference]: Start difference. First operand 8295 states and 31356 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:24,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:24,537 INFO L93 Difference]: Finished difference Result 14334 states and 50973 transitions. [2021-04-15 05:34:24,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 05:34:24,539 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:24,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:24,574 INFO L225 Difference]: With dead ends: 14334 [2021-04-15 05:34:24,574 INFO L226 Difference]: Without dead ends: 14322 [2021-04-15 05:34:24,575 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 815.1ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:34:24,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14322 states. [2021-04-15 05:34:24,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14322 to 8295. [2021-04-15 05:34:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8295 states, 8294 states have (on average 3.780081986978539) internal successors, (31352), 8294 states have internal predecessors, (31352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:24,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8295 states to 8295 states and 31352 transitions. [2021-04-15 05:34:24,840 INFO L78 Accepts]: Start accepts. Automaton has 8295 states and 31352 transitions. Word has length 28 [2021-04-15 05:34:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:24,840 INFO L480 AbstractCegarLoop]: Abstraction has 8295 states and 31352 transitions. [2021-04-15 05:34:24,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand 8295 states and 31352 transitions. [2021-04-15 05:34:24,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:24,854 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:24,854 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:25,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-04-15 05:34:25,055 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:25,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:25,055 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 92 times [2021-04-15 05:34:25,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:25,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265181378] [2021-04-15 05:34:25,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:25,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265181378] [2021-04-15 05:34:25,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295252200] [2021-04-15 05:34:25,139 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:25,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:34:25,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:25,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:34:25,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:25,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:25,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-04-15 05:34:25,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593854921] [2021-04-15 05:34:25,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:34:25,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:25,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:34:25,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:34:25,351 INFO L87 Difference]: Start difference. First operand 8295 states and 31352 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:27,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:27,850 INFO L93 Difference]: Finished difference Result 22194 states and 77568 transitions. [2021-04-15 05:34:27,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-04-15 05:34:27,850 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:27,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:27,902 INFO L225 Difference]: With dead ends: 22194 [2021-04-15 05:34:27,903 INFO L226 Difference]: Without dead ends: 22194 [2021-04-15 05:34:27,903 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 1481.0ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-04-15 05:34:27,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22194 states. [2021-04-15 05:34:28,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22194 to 11506. [2021-04-15 05:34:28,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11506 states, 11505 states have (on average 3.8243372446762276) internal successors, (43999), 11505 states have internal predecessors, (43999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:28,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11506 states to 11506 states and 43999 transitions. [2021-04-15 05:34:28,327 INFO L78 Accepts]: Start accepts. Automaton has 11506 states and 43999 transitions. Word has length 28 [2021-04-15 05:34:28,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:28,327 INFO L480 AbstractCegarLoop]: Abstraction has 11506 states and 43999 transitions. [2021-04-15 05:34:28,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:28,327 INFO L276 IsEmpty]: Start isEmpty. Operand 11506 states and 43999 transitions. [2021-04-15 05:34:28,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:28,347 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:28,347 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:28,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-04-15 05:34:28,548 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:28,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:28,548 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 93 times [2021-04-15 05:34:28,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:28,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177593004] [2021-04-15 05:34:28,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:28,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:28,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177593004] [2021-04-15 05:34:28,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723128695] [2021-04-15 05:34:28,632 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:28,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 05:34:28,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:28,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:34:28,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:28,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:28,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-04-15 05:34:28,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188345355] [2021-04-15 05:34:28,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:34:28,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:28,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:34:28,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:34:28,830 INFO L87 Difference]: Start difference. First operand 11506 states and 43999 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:31,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:31,130 INFO L93 Difference]: Finished difference Result 21305 states and 75279 transitions. [2021-04-15 05:34:31,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-04-15 05:34:31,132 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:31,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:31,181 INFO L225 Difference]: With dead ends: 21305 [2021-04-15 05:34:31,181 INFO L226 Difference]: Without dead ends: 21293 [2021-04-15 05:34:31,181 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 1365.4ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-04-15 05:34:31,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21293 states. [2021-04-15 05:34:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21293 to 11322. [2021-04-15 05:34:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11322 states, 11321 states have (on average 3.8303153431675647) internal successors, (43363), 11321 states have internal predecessors, (43363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:31,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11322 states to 11322 states and 43363 transitions. [2021-04-15 05:34:31,554 INFO L78 Accepts]: Start accepts. Automaton has 11322 states and 43363 transitions. Word has length 28 [2021-04-15 05:34:31,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:31,554 INFO L480 AbstractCegarLoop]: Abstraction has 11322 states and 43363 transitions. [2021-04-15 05:34:31,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 11322 states and 43363 transitions. [2021-04-15 05:34:31,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:31,573 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:31,573 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:31,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:31,774 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:31,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:31,774 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 94 times [2021-04-15 05:34:31,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:31,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144549521] [2021-04-15 05:34:31,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:31,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144549521] [2021-04-15 05:34:31,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503540595] [2021-04-15 05:34:31,855 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:31,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:34:31,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:31,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:34:31,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:32,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:32,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-04-15 05:34:32,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901795058] [2021-04-15 05:34:32,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:34:32,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:32,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:34:32,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:34:32,062 INFO L87 Difference]: Start difference. First operand 11322 states and 43363 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:34,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:34,274 INFO L93 Difference]: Finished difference Result 21173 states and 74684 transitions. [2021-04-15 05:34:34,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-04-15 05:34:34,276 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:34,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:34,327 INFO L225 Difference]: With dead ends: 21173 [2021-04-15 05:34:34,327 INFO L226 Difference]: Without dead ends: 21137 [2021-04-15 05:34:34,327 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 1257.2ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 05:34:34,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21137 states. [2021-04-15 05:34:34,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21137 to 11370. [2021-04-15 05:34:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11370 states, 11369 states have (on average 3.829624417275046) internal successors, (43539), 11369 states have internal predecessors, (43539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:34,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11370 states to 11370 states and 43539 transitions. [2021-04-15 05:34:34,706 INFO L78 Accepts]: Start accepts. Automaton has 11370 states and 43539 transitions. Word has length 28 [2021-04-15 05:34:34,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:34,706 INFO L480 AbstractCegarLoop]: Abstraction has 11370 states and 43539 transitions. [2021-04-15 05:34:34,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:34,706 INFO L276 IsEmpty]: Start isEmpty. Operand 11370 states and 43539 transitions. [2021-04-15 05:34:34,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:34,726 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:34,727 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:34,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-04-15 05:34:34,927 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:34,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:34,927 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 95 times [2021-04-15 05:34:34,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:34,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18410890] [2021-04-15 05:34:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:35,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18410890] [2021-04-15 05:34:35,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846027058] [2021-04-15 05:34:35,015 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:35,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:34:35,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:35,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:34:35,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:35,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:35,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-04-15 05:34:35,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694392839] [2021-04-15 05:34:35,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:34:35,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:35,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:34:35,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:34:35,289 INFO L87 Difference]: Start difference. First operand 11370 states and 43539 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:38,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:38,567 INFO L93 Difference]: Finished difference Result 20914 states and 74023 transitions. [2021-04-15 05:34:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-04-15 05:34:38,567 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:38,613 INFO L225 Difference]: With dead ends: 20914 [2021-04-15 05:34:38,613 INFO L226 Difference]: Without dead ends: 20914 [2021-04-15 05:34:38,614 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 1945.3ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-04-15 05:34:38,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20914 states. [2021-04-15 05:34:38,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20914 to 11566. [2021-04-15 05:34:38,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11566 states, 11565 states have (on average 3.820925205361003) internal successors, (44189), 11565 states have internal predecessors, (44189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:38,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11566 states to 11566 states and 44189 transitions. [2021-04-15 05:34:38,944 INFO L78 Accepts]: Start accepts. Automaton has 11566 states and 44189 transitions. Word has length 28 [2021-04-15 05:34:38,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:38,945 INFO L480 AbstractCegarLoop]: Abstraction has 11566 states and 44189 transitions. [2021-04-15 05:34:38,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:38,945 INFO L276 IsEmpty]: Start isEmpty. Operand 11566 states and 44189 transitions. [2021-04-15 05:34:38,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:38,964 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:38,964 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:39,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:39,165 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:39,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:39,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 96 times [2021-04-15 05:34:39,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:39,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087527476] [2021-04-15 05:34:39,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:39,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087527476] [2021-04-15 05:34:39,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856739654] [2021-04-15 05:34:39,256 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:39,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 05:34:39,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:39,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:34:39,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:39,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:39,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-04-15 05:34:39,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930293627] [2021-04-15 05:34:39,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:34:39,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:39,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:34:39,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:34:39,610 INFO L87 Difference]: Start difference. First operand 11566 states and 44189 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:42,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:42,670 INFO L93 Difference]: Finished difference Result 20375 states and 72554 transitions. [2021-04-15 05:34:42,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-04-15 05:34:42,673 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:42,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:42,720 INFO L225 Difference]: With dead ends: 20375 [2021-04-15 05:34:42,720 INFO L226 Difference]: Without dead ends: 20363 [2021-04-15 05:34:42,721 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 1858.2ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-04-15 05:34:42,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20363 states. [2021-04-15 05:34:43,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20363 to 11444. [2021-04-15 05:34:43,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11444 states, 11443 states have (on average 3.82469632089487) internal successors, (43766), 11443 states have internal predecessors, (43766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:43,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11444 states to 11444 states and 43766 transitions. [2021-04-15 05:34:43,064 INFO L78 Accepts]: Start accepts. Automaton has 11444 states and 43766 transitions. Word has length 28 [2021-04-15 05:34:43,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:43,064 INFO L480 AbstractCegarLoop]: Abstraction has 11444 states and 43766 transitions. [2021-04-15 05:34:43,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:43,064 INFO L276 IsEmpty]: Start isEmpty. Operand 11444 states and 43766 transitions. [2021-04-15 05:34:43,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:43,084 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:43,084 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:43,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-04-15 05:34:43,284 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:43,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:43,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 97 times [2021-04-15 05:34:43,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:43,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989921096] [2021-04-15 05:34:43,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:43,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989921096] [2021-04-15 05:34:43,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596484017] [2021-04-15 05:34:43,375 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:43,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:34:43,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:43,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:43,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-04-15 05:34:43,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471602407] [2021-04-15 05:34:43,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:34:43,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:43,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:34:43,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:34:43,605 INFO L87 Difference]: Start difference. First operand 11444 states and 43766 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:45,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:45,942 INFO L93 Difference]: Finished difference Result 19613 states and 70459 transitions. [2021-04-15 05:34:45,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-04-15 05:34:45,944 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:45,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:45,995 INFO L225 Difference]: With dead ends: 19613 [2021-04-15 05:34:45,995 INFO L226 Difference]: Without dead ends: 19577 [2021-04-15 05:34:45,995 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 1360.4ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-04-15 05:34:46,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19577 states. [2021-04-15 05:34:46,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19577 to 11468. [2021-04-15 05:34:46,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11468 states, 11467 states have (on average 3.8236679166303307) internal successors, (43846), 11467 states have internal predecessors, (43846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11468 states to 11468 states and 43846 transitions. [2021-04-15 05:34:46,323 INFO L78 Accepts]: Start accepts. Automaton has 11468 states and 43846 transitions. Word has length 28 [2021-04-15 05:34:46,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:46,323 INFO L480 AbstractCegarLoop]: Abstraction has 11468 states and 43846 transitions. [2021-04-15 05:34:46,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand 11468 states and 43846 transitions. [2021-04-15 05:34:46,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:46,343 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:46,343 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:46,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:46,544 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:46,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:46,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 98 times [2021-04-15 05:34:46,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:46,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219038398] [2021-04-15 05:34:46,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:46,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219038398] [2021-04-15 05:34:46,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987922678] [2021-04-15 05:34:46,623 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:46,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:34:46,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:46,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:34:46,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:46,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:46,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 05:34:46,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766503280] [2021-04-15 05:34:46,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:34:46,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:46,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:34:46,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:34:46,916 INFO L87 Difference]: Start difference. First operand 11468 states and 43846 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:49,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:49,906 INFO L93 Difference]: Finished difference Result 28622 states and 102312 transitions. [2021-04-15 05:34:49,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-04-15 05:34:49,909 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:49,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:49,983 INFO L225 Difference]: With dead ends: 28622 [2021-04-15 05:34:49,983 INFO L226 Difference]: Without dead ends: 28622 [2021-04-15 05:34:49,984 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 1820.7ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-04-15 05:34:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28622 states. [2021-04-15 05:34:50,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28622 to 11820. [2021-04-15 05:34:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11820 states, 11819 states have (on average 3.8508334038412726) internal successors, (45513), 11819 states have internal predecessors, (45513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:50,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11820 states to 11820 states and 45513 transitions. [2021-04-15 05:34:50,432 INFO L78 Accepts]: Start accepts. Automaton has 11820 states and 45513 transitions. Word has length 28 [2021-04-15 05:34:50,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:50,432 INFO L480 AbstractCegarLoop]: Abstraction has 11820 states and 45513 transitions. [2021-04-15 05:34:50,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:50,432 INFO L276 IsEmpty]: Start isEmpty. Operand 11820 states and 45513 transitions. [2021-04-15 05:34:50,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:50,456 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:50,456 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:50,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2021-04-15 05:34:50,657 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:50,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:50,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 99 times [2021-04-15 05:34:50,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:50,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058006256] [2021-04-15 05:34:50,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:50,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058006256] [2021-04-15 05:34:50,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260723816] [2021-04-15 05:34:50,756 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:50,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:34:50,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:50,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:34:50,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:51,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:51,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 05:34:51,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841576265] [2021-04-15 05:34:51,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:34:51,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:51,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:34:51,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:34:51,059 INFO L87 Difference]: Start difference. First operand 11820 states and 45513 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:53,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:53,793 INFO L93 Difference]: Finished difference Result 28081 states and 101108 transitions. [2021-04-15 05:34:53,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-04-15 05:34:53,795 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:53,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:53,872 INFO L225 Difference]: With dead ends: 28081 [2021-04-15 05:34:53,873 INFO L226 Difference]: Without dead ends: 28081 [2021-04-15 05:34:53,873 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 1805.8ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-04-15 05:34:53,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28081 states. [2021-04-15 05:34:54,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28081 to 11710. [2021-04-15 05:34:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11710 states, 11709 states have (on average 3.838244085746007) internal successors, (44942), 11709 states have internal predecessors, (44942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11710 states to 11710 states and 44942 transitions. [2021-04-15 05:34:54,319 INFO L78 Accepts]: Start accepts. Automaton has 11710 states and 44942 transitions. Word has length 28 [2021-04-15 05:34:54,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:54,319 INFO L480 AbstractCegarLoop]: Abstraction has 11710 states and 44942 transitions. [2021-04-15 05:34:54,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 11710 states and 44942 transitions. [2021-04-15 05:34:54,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:54,340 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:54,340 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:54,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:54,540 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:54,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:54,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 100 times [2021-04-15 05:34:54,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:54,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388920135] [2021-04-15 05:34:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:54,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388920135] [2021-04-15 05:34:54,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154351212] [2021-04-15 05:34:54,624 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:54,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:34:54,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:54,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:34:54,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:54,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:54,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-04-15 05:34:54,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261363423] [2021-04-15 05:34:54,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:34:54,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:54,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:34:54,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:34:54,921 INFO L87 Difference]: Start difference. First operand 11710 states and 44942 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:56,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:56,979 INFO L93 Difference]: Finished difference Result 22237 states and 80394 transitions. [2021-04-15 05:34:56,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 05:34:56,982 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:56,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:57,032 INFO L225 Difference]: With dead ends: 22237 [2021-04-15 05:34:57,032 INFO L226 Difference]: Without dead ends: 22237 [2021-04-15 05:34:57,032 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1162.8ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 05:34:57,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22237 states. [2021-04-15 05:34:57,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22237 to 11719. [2021-04-15 05:34:57,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11719 states, 11718 states have (on average 3.8372589179040792) internal successors, (44965), 11718 states have internal predecessors, (44965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:57,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11719 states to 11719 states and 44965 transitions. [2021-04-15 05:34:57,402 INFO L78 Accepts]: Start accepts. Automaton has 11719 states and 44965 transitions. Word has length 28 [2021-04-15 05:34:57,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:34:57,402 INFO L480 AbstractCegarLoop]: Abstraction has 11719 states and 44965 transitions. [2021-04-15 05:34:57,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:57,402 INFO L276 IsEmpty]: Start isEmpty. Operand 11719 states and 44965 transitions. [2021-04-15 05:34:57,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:34:57,423 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:34:57,424 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:34:57,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:57,624 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:34:57,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:34:57,625 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 101 times [2021-04-15 05:34:57,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:34:57,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982878325] [2021-04-15 05:34:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:34:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:34:57,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:34:57,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982878325] [2021-04-15 05:34:57,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379368174] [2021-04-15 05:34:57,706 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:34:57,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:34:57,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:34:57,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:34:57,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:34:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:34:57,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:34:57,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-04-15 05:34:57,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65218282] [2021-04-15 05:34:57,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:34:57,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:34:57,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:34:57,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:34:57,988 INFO L87 Difference]: Start difference. First operand 11719 states and 44965 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:34:59,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:34:59,678 INFO L93 Difference]: Finished difference Result 20596 states and 75154 transitions. [2021-04-15 05:34:59,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 05:34:59,681 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:34:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:34:59,727 INFO L225 Difference]: With dead ends: 20596 [2021-04-15 05:34:59,727 INFO L226 Difference]: Without dead ends: 20596 [2021-04-15 05:34:59,727 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1000.9ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 05:34:59,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20596 states. [2021-04-15 05:35:00,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20596 to 11731. [2021-04-15 05:35:00,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11731 states, 11730 states have (on average 3.8365728900255753) internal successors, (45003), 11730 states have internal predecessors, (45003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:00,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11731 states to 11731 states and 45003 transitions. [2021-04-15 05:35:00,059 INFO L78 Accepts]: Start accepts. Automaton has 11731 states and 45003 transitions. Word has length 28 [2021-04-15 05:35:00,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:00,060 INFO L480 AbstractCegarLoop]: Abstraction has 11731 states and 45003 transitions. [2021-04-15 05:35:00,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:00,060 INFO L276 IsEmpty]: Start isEmpty. Operand 11731 states and 45003 transitions. [2021-04-15 05:35:00,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:35:00,079 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:00,079 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:00,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:00,280 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:00,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:00,280 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 102 times [2021-04-15 05:35:00,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:00,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575553819] [2021-04-15 05:35:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:35:00,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575553819] [2021-04-15 05:35:00,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297440782] [2021-04-15 05:35:00,361 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:00,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 05:35:00,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:35:00,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:35:00,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:00,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:00,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 05:35:00,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504143217] [2021-04-15 05:35:00,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:35:00,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:00,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:35:00,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:35:00,807 INFO L87 Difference]: Start difference. First operand 11731 states and 45003 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:03,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:03,653 INFO L93 Difference]: Finished difference Result 21379 states and 77391 transitions. [2021-04-15 05:35:03,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-04-15 05:35:03,655 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:35:03,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:03,710 INFO L225 Difference]: With dead ends: 21379 [2021-04-15 05:35:03,711 INFO L226 Difference]: Without dead ends: 21379 [2021-04-15 05:35:03,711 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 1853.9ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-04-15 05:35:03,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21379 states. [2021-04-15 05:35:04,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21379 to 11839. [2021-04-15 05:35:04,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11839 states, 11838 states have (on average 3.829785436729177) internal successors, (45337), 11838 states have internal predecessors, (45337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:04,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11839 states to 11839 states and 45337 transitions. [2021-04-15 05:35:04,088 INFO L78 Accepts]: Start accepts. Automaton has 11839 states and 45337 transitions. Word has length 28 [2021-04-15 05:35:04,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:04,089 INFO L480 AbstractCegarLoop]: Abstraction has 11839 states and 45337 transitions. [2021-04-15 05:35:04,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:04,089 INFO L276 IsEmpty]: Start isEmpty. Operand 11839 states and 45337 transitions. [2021-04-15 05:35:04,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:35:04,109 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:04,109 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:04,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-04-15 05:35:04,310 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:04,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:04,310 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 103 times [2021-04-15 05:35:04,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:04,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090465227] [2021-04-15 05:35:04,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:35:04,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090465227] [2021-04-15 05:35:04,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524439968] [2021-04-15 05:35:04,420 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:04,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:35:04,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:04,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:04,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 05:35:04,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138122052] [2021-04-15 05:35:04,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:35:04,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:04,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:35:04,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:35:04,751 INFO L87 Difference]: Start difference. First operand 11839 states and 45337 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:07,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:07,553 INFO L93 Difference]: Finished difference Result 20760 states and 75687 transitions. [2021-04-15 05:35:07,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-04-15 05:35:07,556 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:35:07,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:07,611 INFO L225 Difference]: With dead ends: 20760 [2021-04-15 05:35:07,611 INFO L226 Difference]: Without dead ends: 20756 [2021-04-15 05:35:07,612 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 1748.8ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 05:35:07,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20756 states. [2021-04-15 05:35:07,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20756 to 11765. [2021-04-15 05:35:07,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11765 states, 11764 states have (on average 3.833560013600816) internal successors, (45098), 11764 states have internal predecessors, (45098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:08,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11765 states to 11765 states and 45098 transitions. [2021-04-15 05:35:08,041 INFO L78 Accepts]: Start accepts. Automaton has 11765 states and 45098 transitions. Word has length 28 [2021-04-15 05:35:08,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:08,041 INFO L480 AbstractCegarLoop]: Abstraction has 11765 states and 45098 transitions. [2021-04-15 05:35:08,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand 11765 states and 45098 transitions. [2021-04-15 05:35:08,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:35:08,063 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:08,063 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:08,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-04-15 05:35:08,264 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:08,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:08,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 104 times [2021-04-15 05:35:08,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:08,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035665685] [2021-04-15 05:35:08,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:08,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035665685] [2021-04-15 05:35:08,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001918786] [2021-04-15 05:35:08,371 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:08,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:35:08,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:35:08,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:35:08,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:08,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:08,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 05:35:08,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838472032] [2021-04-15 05:35:08,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:35:08,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:08,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:35:08,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:35:08,675 INFO L87 Difference]: Start difference. First operand 11765 states and 45098 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:11,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:11,251 INFO L93 Difference]: Finished difference Result 20065 states and 72452 transitions. [2021-04-15 05:35:11,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-04-15 05:35:11,253 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:35:11,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:11,301 INFO L225 Difference]: With dead ends: 20065 [2021-04-15 05:35:11,301 INFO L226 Difference]: Without dead ends: 20065 [2021-04-15 05:35:11,302 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 1636.7ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-04-15 05:35:11,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20065 states. [2021-04-15 05:35:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20065 to 11992. [2021-04-15 05:35:11,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11992 states, 11991 states have (on average 3.8358769076807606) internal successors, (45996), 11991 states have internal predecessors, (45996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:11,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11992 states to 11992 states and 45996 transitions. [2021-04-15 05:35:11,795 INFO L78 Accepts]: Start accepts. Automaton has 11992 states and 45996 transitions. Word has length 28 [2021-04-15 05:35:11,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:11,795 INFO L480 AbstractCegarLoop]: Abstraction has 11992 states and 45996 transitions. [2021-04-15 05:35:11,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:11,795 INFO L276 IsEmpty]: Start isEmpty. Operand 11992 states and 45996 transitions. [2021-04-15 05:35:11,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:35:11,816 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:11,816 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:12,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:12,017 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:12,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:12,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 105 times [2021-04-15 05:35:12,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:12,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179871638] [2021-04-15 05:35:12,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:12,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:12,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179871638] [2021-04-15 05:35:12,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247531674] [2021-04-15 05:35:12,117 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:12,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 05:35:12,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:35:12,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:35:12,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:12,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:12,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 05:35:12,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694182176] [2021-04-15 05:35:12,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:35:12,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:12,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:35:12,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:35:12,439 INFO L87 Difference]: Start difference. First operand 11992 states and 45996 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:14,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:14,921 INFO L93 Difference]: Finished difference Result 19596 states and 71161 transitions. [2021-04-15 05:35:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-04-15 05:35:14,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:35:14,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:14,982 INFO L225 Difference]: With dead ends: 19596 [2021-04-15 05:35:14,982 INFO L226 Difference]: Without dead ends: 19584 [2021-04-15 05:35:14,983 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1586.5ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-04-15 05:35:15,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19584 states. [2021-04-15 05:35:15,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19584 to 12094. [2021-04-15 05:35:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12094 states, 12093 states have (on average 3.8302323658314728) internal successors, (46319), 12093 states have internal predecessors, (46319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:15,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12094 states to 12094 states and 46319 transitions. [2021-04-15 05:35:15,357 INFO L78 Accepts]: Start accepts. Automaton has 12094 states and 46319 transitions. Word has length 28 [2021-04-15 05:35:15,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:15,357 INFO L480 AbstractCegarLoop]: Abstraction has 12094 states and 46319 transitions. [2021-04-15 05:35:15,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 12094 states and 46319 transitions. [2021-04-15 05:35:15,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:35:15,382 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:15,382 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:15,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-04-15 05:35:15,585 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:15,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:15,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 73 times [2021-04-15 05:35:15,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:15,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317789663] [2021-04-15 05:35:15,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:15,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317789663] [2021-04-15 05:35:15,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747829650] [2021-04-15 05:35:15,714 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:15,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:35:15,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:15,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:15,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-04-15 05:35:15,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018393679] [2021-04-15 05:35:15,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:35:15,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:15,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:35:15,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:35:15,978 INFO L87 Difference]: Start difference. First operand 12094 states and 46319 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:17,313 INFO L93 Difference]: Finished difference Result 17012 states and 63246 transitions. [2021-04-15 05:35:17,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 05:35:17,315 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:35:17,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:17,355 INFO L225 Difference]: With dead ends: 17012 [2021-04-15 05:35:17,356 INFO L226 Difference]: Without dead ends: 17012 [2021-04-15 05:35:17,356 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 725.8ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:35:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17012 states. [2021-04-15 05:35:17,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17012 to 12166. [2021-04-15 05:35:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12166 states, 12165 states have (on average 3.8256473489519114) internal successors, (46539), 12165 states have internal predecessors, (46539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:17,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12166 states to 12166 states and 46539 transitions. [2021-04-15 05:35:17,671 INFO L78 Accepts]: Start accepts. Automaton has 12166 states and 46539 transitions. Word has length 28 [2021-04-15 05:35:17,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:17,672 INFO L480 AbstractCegarLoop]: Abstraction has 12166 states and 46539 transitions. [2021-04-15 05:35:17,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:17,672 INFO L276 IsEmpty]: Start isEmpty. Operand 12166 states and 46539 transitions. [2021-04-15 05:35:17,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:35:17,692 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:17,692 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:17,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:17,893 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:17,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:17,893 INFO L82 PathProgramCache]: Analyzing trace with hash 149924120, now seen corresponding path program 74 times [2021-04-15 05:35:17,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:17,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375455317] [2021-04-15 05:35:17,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:35:17,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375455317] [2021-04-15 05:35:17,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766147191] [2021-04-15 05:35:17,986 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:18,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:35:18,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:35:18,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:35:18,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:18,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:18,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-04-15 05:35:18,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793705202] [2021-04-15 05:35:18,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:35:18,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:18,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:35:18,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:35:18,320 INFO L87 Difference]: Start difference. First operand 12166 states and 46539 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:19,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:19,374 INFO L93 Difference]: Finished difference Result 15303 states and 56668 transitions. [2021-04-15 05:35:19,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:35:19,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:35:19,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:19,410 INFO L225 Difference]: With dead ends: 15303 [2021-04-15 05:35:19,411 INFO L226 Difference]: Without dead ends: 15252 [2021-04-15 05:35:19,411 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 760.8ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 05:35:19,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15252 states. [2021-04-15 05:35:19,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15252 to 11807. [2021-04-15 05:35:19,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11807 states, 11806 states have (on average 3.8175503981026595) internal successors, (45070), 11806 states have internal predecessors, (45070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:19,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11807 states to 11807 states and 45070 transitions. [2021-04-15 05:35:19,669 INFO L78 Accepts]: Start accepts. Automaton has 11807 states and 45070 transitions. Word has length 28 [2021-04-15 05:35:19,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:19,669 INFO L480 AbstractCegarLoop]: Abstraction has 11807 states and 45070 transitions. [2021-04-15 05:35:19,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:19,669 INFO L276 IsEmpty]: Start isEmpty. Operand 11807 states and 45070 transitions. [2021-04-15 05:35:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:35:19,689 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:19,689 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:19,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:19,889 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:19,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:19,890 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 75 times [2021-04-15 05:35:19,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:19,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414302880] [2021-04-15 05:35:19,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:19,974 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:19,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414302880] [2021-04-15 05:35:19,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307793723] [2021-04-15 05:35:19,975 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:19,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 05:35:19,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:35:19,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:35:19,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:20,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:20,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-04-15 05:35:20,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006427110] [2021-04-15 05:35:20,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:35:20,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:20,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:35:20,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:35:20,205 INFO L87 Difference]: Start difference. First operand 11807 states and 45070 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:21,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:21,523 INFO L93 Difference]: Finished difference Result 17683 states and 64727 transitions. [2021-04-15 05:35:21,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 05:35:21,525 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:35:21,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:21,566 INFO L225 Difference]: With dead ends: 17683 [2021-04-15 05:35:21,566 INFO L226 Difference]: Without dead ends: 17683 [2021-04-15 05:35:21,566 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 799.2ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 05:35:21,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17683 states. [2021-04-15 05:35:21,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17683 to 12145. [2021-04-15 05:35:21,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12145 states, 12144 states have (on average 3.799324769433465) internal successors, (46139), 12144 states have internal predecessors, (46139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:21,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12145 states to 12145 states and 46139 transitions. [2021-04-15 05:35:21,993 INFO L78 Accepts]: Start accepts. Automaton has 12145 states and 46139 transitions. Word has length 28 [2021-04-15 05:35:21,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:21,993 INFO L480 AbstractCegarLoop]: Abstraction has 12145 states and 46139 transitions. [2021-04-15 05:35:21,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 12145 states and 46139 transitions. [2021-04-15 05:35:22,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:35:22,013 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:22,013 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:22,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:22,214 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:22,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:22,214 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 76 times [2021-04-15 05:35:22,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:22,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803392311] [2021-04-15 05:35:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:35:22,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803392311] [2021-04-15 05:35:22,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772709677] [2021-04-15 05:35:22,305 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:22,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:35:22,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:35:22,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:35:22,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:35:22,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:22,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-04-15 05:35:22,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334450049] [2021-04-15 05:35:22,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:35:22,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:22,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:35:22,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:35:22,516 INFO L87 Difference]: Start difference. First operand 12145 states and 46139 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:23,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:23,577 INFO L93 Difference]: Finished difference Result 17151 states and 63339 transitions. [2021-04-15 05:35:23,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 05:35:23,579 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:35:23,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:23,619 INFO L225 Difference]: With dead ends: 17151 [2021-04-15 05:35:23,619 INFO L226 Difference]: Without dead ends: 17143 [2021-04-15 05:35:23,620 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 624.6ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:35:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17143 states. [2021-04-15 05:35:23,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17143 to 12085. [2021-04-15 05:35:23,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12085 states, 12084 states have (on average 3.8013075140681893) internal successors, (45935), 12084 states have internal predecessors, (45935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12085 states to 12085 states and 45935 transitions. [2021-04-15 05:35:23,907 INFO L78 Accepts]: Start accepts. Automaton has 12085 states and 45935 transitions. Word has length 28 [2021-04-15 05:35:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:23,907 INFO L480 AbstractCegarLoop]: Abstraction has 12085 states and 45935 transitions. [2021-04-15 05:35:23,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:23,907 INFO L276 IsEmpty]: Start isEmpty. Operand 12085 states and 45935 transitions. [2021-04-15 05:35:23,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:35:23,927 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:23,927 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:24,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:24,128 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:24,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:24,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 77 times [2021-04-15 05:35:24,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:24,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679562616] [2021-04-15 05:35:24,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:24,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679562616] [2021-04-15 05:35:24,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905384799] [2021-04-15 05:35:24,232 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:24,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 05:35:24,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:35:24,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:35:24,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:24,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:24,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-04-15 05:35:24,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886614761] [2021-04-15 05:35:24,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:35:24,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:24,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:35:24,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:35:24,453 INFO L87 Difference]: Start difference. First operand 12085 states and 45935 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:25,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:25,703 INFO L93 Difference]: Finished difference Result 17051 states and 63051 transitions. [2021-04-15 05:35:25,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 05:35:25,705 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:35:25,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:25,747 INFO L225 Difference]: With dead ends: 17051 [2021-04-15 05:35:25,747 INFO L226 Difference]: Without dead ends: 17039 [2021-04-15 05:35:25,748 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 689.8ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 05:35:25,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17039 states. [2021-04-15 05:35:25,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17039 to 12051. [2021-04-15 05:35:25,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12051 states, 12050 states have (on average 3.8034854771784232) internal successors, (45832), 12050 states have internal predecessors, (45832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:26,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12051 states to 12051 states and 45832 transitions. [2021-04-15 05:35:26,033 INFO L78 Accepts]: Start accepts. Automaton has 12051 states and 45832 transitions. Word has length 28 [2021-04-15 05:35:26,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:26,033 INFO L480 AbstractCegarLoop]: Abstraction has 12051 states and 45832 transitions. [2021-04-15 05:35:26,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:26,033 INFO L276 IsEmpty]: Start isEmpty. Operand 12051 states and 45832 transitions. [2021-04-15 05:35:26,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:35:26,053 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:26,054 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:26,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-04-15 05:35:26,254 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:26,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:26,254 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 78 times [2021-04-15 05:35:26,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:26,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977055328] [2021-04-15 05:35:26,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:35:26,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977055328] [2021-04-15 05:35:26,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047031889] [2021-04-15 05:35:26,345 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:26,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:35:26,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:35:26,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:35:26,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:26,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:26,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-04-15 05:35:26,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825831679] [2021-04-15 05:35:26,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:35:26,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:26,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:35:26,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:35:26,644 INFO L87 Difference]: Start difference. First operand 12051 states and 45832 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:28,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:28,952 INFO L93 Difference]: Finished difference Result 23232 states and 83078 transitions. [2021-04-15 05:35:28,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 05:35:28,954 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:35:28,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:29,005 INFO L225 Difference]: With dead ends: 23232 [2021-04-15 05:35:29,005 INFO L226 Difference]: Without dead ends: 23232 [2021-04-15 05:35:29,005 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1356.0ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 05:35:29,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23232 states. [2021-04-15 05:35:29,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23232 to 12031. [2021-04-15 05:35:29,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12031 states, 12030 states have (on average 3.8021612635078967) internal successors, (45740), 12030 states have internal predecessors, (45740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12031 states to 12031 states and 45740 transitions. [2021-04-15 05:35:29,334 INFO L78 Accepts]: Start accepts. Automaton has 12031 states and 45740 transitions. Word has length 28 [2021-04-15 05:35:29,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:29,334 INFO L480 AbstractCegarLoop]: Abstraction has 12031 states and 45740 transitions. [2021-04-15 05:35:29,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:29,335 INFO L276 IsEmpty]: Start isEmpty. Operand 12031 states and 45740 transitions. [2021-04-15 05:35:29,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:35:29,354 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:29,354 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:29,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:29,554 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:29,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:29,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 106 times [2021-04-15 05:35:29,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:29,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038133533] [2021-04-15 05:35:29,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:35:29,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038133533] [2021-04-15 05:35:29,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970940317] [2021-04-15 05:35:29,627 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:29,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:35:29,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:35:29,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:35:29,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:29,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:29,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-04-15 05:35:29,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570671457] [2021-04-15 05:35:29,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:35:29,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:29,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:35:29,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:35:29,921 INFO L87 Difference]: Start difference. First operand 12031 states and 45740 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:31,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:31,730 INFO L93 Difference]: Finished difference Result 19093 states and 69327 transitions. [2021-04-15 05:35:31,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 05:35:31,733 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:35:31,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:31,776 INFO L225 Difference]: With dead ends: 19093 [2021-04-15 05:35:31,776 INFO L226 Difference]: Without dead ends: 19080 [2021-04-15 05:35:31,776 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1006.0ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 05:35:31,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19080 states. [2021-04-15 05:35:32,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19080 to 13545. [2021-04-15 05:35:32,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13545 states, 13544 states have (on average 3.87322799763733) internal successors, (52459), 13544 states have internal predecessors, (52459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:32,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13545 states to 13545 states and 52459 transitions. [2021-04-15 05:35:32,109 INFO L78 Accepts]: Start accepts. Automaton has 13545 states and 52459 transitions. Word has length 28 [2021-04-15 05:35:32,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:32,110 INFO L480 AbstractCegarLoop]: Abstraction has 13545 states and 52459 transitions. [2021-04-15 05:35:32,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:32,110 INFO L276 IsEmpty]: Start isEmpty. Operand 13545 states and 52459 transitions. [2021-04-15 05:35:32,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:35:32,132 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:32,132 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:32,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-04-15 05:35:32,333 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:32,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:32,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 107 times [2021-04-15 05:35:32,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:32,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106603888] [2021-04-15 05:35:32,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:35:32,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106603888] [2021-04-15 05:35:32,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151694975] [2021-04-15 05:35:32,464 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:35:32,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:35:32,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:35:32,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:35:32,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:32,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:32,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-04-15 05:35:32,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074430321] [2021-04-15 05:35:32,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:35:32,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:32,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:35:32,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:35:32,857 INFO L87 Difference]: Start difference. First operand 13545 states and 52459 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:34,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:34,752 INFO L93 Difference]: Finished difference Result 19245 states and 69750 transitions. [2021-04-15 05:35:34,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 05:35:34,754 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:35:34,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:34,796 INFO L225 Difference]: With dead ends: 19245 [2021-04-15 05:35:34,796 INFO L226 Difference]: Without dead ends: 19230 [2021-04-15 05:35:34,796 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1183.8ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:35:34,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19230 states. [2021-04-15 05:35:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19230 to 13512. [2021-04-15 05:35:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13512 states, 13511 states have (on average 3.872030197616757) internal successors, (52315), 13511 states have internal predecessors, (52315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:35,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13512 states to 13512 states and 52315 transitions. [2021-04-15 05:35:35,146 INFO L78 Accepts]: Start accepts. Automaton has 13512 states and 52315 transitions. Word has length 28 [2021-04-15 05:35:35,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:35,146 INFO L480 AbstractCegarLoop]: Abstraction has 13512 states and 52315 transitions. [2021-04-15 05:35:35,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:35,146 INFO L276 IsEmpty]: Start isEmpty. Operand 13512 states and 52315 transitions. [2021-04-15 05:35:35,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:35:35,168 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:35,169 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:35,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-04-15 05:35:35,369 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:35,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:35,370 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 108 times [2021-04-15 05:35:35,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:35,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253769968] [2021-04-15 05:35:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:35,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253769968] [2021-04-15 05:35:35,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941761255] [2021-04-15 05:35:35,456 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:35,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:35:35,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:35:35,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:35:35,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:35,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:35,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-04-15 05:35:35,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532118641] [2021-04-15 05:35:35,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:35:35,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:35,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:35:35,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:35:35,762 INFO L87 Difference]: Start difference. First operand 13512 states and 52315 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:37,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:37,463 INFO L93 Difference]: Finished difference Result 21572 states and 78297 transitions. [2021-04-15 05:35:37,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 05:35:37,465 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:35:37,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:37,515 INFO L225 Difference]: With dead ends: 21572 [2021-04-15 05:35:37,515 INFO L226 Difference]: Without dead ends: 21559 [2021-04-15 05:35:37,515 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 938.1ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 05:35:37,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21559 states. [2021-04-15 05:35:37,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21559 to 13594. [2021-04-15 05:35:37,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13594 states, 13593 states have (on average 3.877731185168837) internal successors, (52710), 13593 states have internal predecessors, (52710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:37,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13594 states to 13594 states and 52710 transitions. [2021-04-15 05:35:37,889 INFO L78 Accepts]: Start accepts. Automaton has 13594 states and 52710 transitions. Word has length 28 [2021-04-15 05:35:37,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:37,889 INFO L480 AbstractCegarLoop]: Abstraction has 13594 states and 52710 transitions. [2021-04-15 05:35:37,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:37,889 INFO L276 IsEmpty]: Start isEmpty. Operand 13594 states and 52710 transitions. [2021-04-15 05:35:37,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:35:37,911 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:37,911 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:38,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-04-15 05:35:38,112 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:38,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:38,112 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 109 times [2021-04-15 05:35:38,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:38,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604488342] [2021-04-15 05:35:38,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:38,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604488342] [2021-04-15 05:35:38,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199308713] [2021-04-15 05:35:38,211 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:38,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:35:38,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:38,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:38,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-04-15 05:35:38,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639084953] [2021-04-15 05:35:38,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:35:38,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:38,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:35:38,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:35:38,568 INFO L87 Difference]: Start difference. First operand 13594 states and 52710 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:40,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:40,338 INFO L93 Difference]: Finished difference Result 22871 states and 82348 transitions. [2021-04-15 05:35:40,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 05:35:40,341 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:35:40,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:40,396 INFO L225 Difference]: With dead ends: 22871 [2021-04-15 05:35:40,397 INFO L226 Difference]: Without dead ends: 22871 [2021-04-15 05:35:40,397 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1148.3ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 05:35:40,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22871 states. [2021-04-15 05:35:40,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22871 to 13618. [2021-04-15 05:35:40,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13618 states, 13617 states have (on average 3.8742748035543806) internal successors, (52756), 13617 states have internal predecessors, (52756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:40,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13618 states to 13618 states and 52756 transitions. [2021-04-15 05:35:40,806 INFO L78 Accepts]: Start accepts. Automaton has 13618 states and 52756 transitions. Word has length 28 [2021-04-15 05:35:40,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:40,806 INFO L480 AbstractCegarLoop]: Abstraction has 13618 states and 52756 transitions. [2021-04-15 05:35:40,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:40,806 INFO L276 IsEmpty]: Start isEmpty. Operand 13618 states and 52756 transitions. [2021-04-15 05:35:40,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:35:40,830 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:40,830 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:41,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-04-15 05:35:41,031 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:41,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:41,031 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 79 times [2021-04-15 05:35:41,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:41,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244602876] [2021-04-15 05:35:41,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:41,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244602876] [2021-04-15 05:35:41,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562072531] [2021-04-15 05:35:41,130 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:41,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:35:41,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:41,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:41,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-04-15 05:35:41,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555295817] [2021-04-15 05:35:41,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:35:41,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:41,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:35:41,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:35:41,428 INFO L87 Difference]: Start difference. First operand 13618 states and 52756 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:43,840 INFO L93 Difference]: Finished difference Result 23672 states and 87338 transitions. [2021-04-15 05:35:43,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-04-15 05:35:43,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:35:43,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:43,898 INFO L225 Difference]: With dead ends: 23672 [2021-04-15 05:35:43,898 INFO L226 Difference]: Without dead ends: 23668 [2021-04-15 05:35:43,899 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 1455.0ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-04-15 05:35:43,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23668 states. [2021-04-15 05:35:44,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23668 to 13914. [2021-04-15 05:35:44,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13914 states, 13913 states have (on average 3.862718320994753) internal successors, (53742), 13913 states have internal predecessors, (53742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:44,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13914 states to 13914 states and 53742 transitions. [2021-04-15 05:35:44,407 INFO L78 Accepts]: Start accepts. Automaton has 13914 states and 53742 transitions. Word has length 28 [2021-04-15 05:35:44,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:44,407 INFO L480 AbstractCegarLoop]: Abstraction has 13914 states and 53742 transitions. [2021-04-15 05:35:44,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:44,407 INFO L276 IsEmpty]: Start isEmpty. Operand 13914 states and 53742 transitions. [2021-04-15 05:35:44,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:35:44,431 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:44,431 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:44,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:44,631 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:44,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:44,632 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 110 times [2021-04-15 05:35:44,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:44,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122289012] [2021-04-15 05:35:44,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:44,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122289012] [2021-04-15 05:35:44,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658035074] [2021-04-15 05:35:44,719 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:44,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:35:44,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:35:44,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:35:44,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:44,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:44,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:35:44,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7221998] [2021-04-15 05:35:44,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:35:44,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:44,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:35:44,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:35:44,975 INFO L87 Difference]: Start difference. First operand 13914 states and 53742 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:46,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:46,570 INFO L93 Difference]: Finished difference Result 20142 states and 74157 transitions. [2021-04-15 05:35:46,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 05:35:46,573 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:35:46,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:46,620 INFO L225 Difference]: With dead ends: 20142 [2021-04-15 05:35:46,620 INFO L226 Difference]: Without dead ends: 20119 [2021-04-15 05:35:46,621 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 928.4ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 05:35:46,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20119 states. [2021-04-15 05:35:46,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20119 to 13940. [2021-04-15 05:35:46,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13940 states, 13939 states have (on average 3.8696463160915417) internal successors, (53939), 13939 states have internal predecessors, (53939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:46,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13940 states to 13940 states and 53939 transitions. [2021-04-15 05:35:46,971 INFO L78 Accepts]: Start accepts. Automaton has 13940 states and 53939 transitions. Word has length 28 [2021-04-15 05:35:46,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:46,971 INFO L480 AbstractCegarLoop]: Abstraction has 13940 states and 53939 transitions. [2021-04-15 05:35:46,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:46,971 INFO L276 IsEmpty]: Start isEmpty. Operand 13940 states and 53939 transitions. [2021-04-15 05:35:46,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:35:46,994 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:46,994 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:47,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-04-15 05:35:47,196 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:47,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:47,196 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 111 times [2021-04-15 05:35:47,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:47,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474058493] [2021-04-15 05:35:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:47,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474058493] [2021-04-15 05:35:47,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7158437] [2021-04-15 05:35:47,280 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:47,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:35:47,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:35:47,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:35:47,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:47,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:47,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:35:47,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094456981] [2021-04-15 05:35:47,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:35:47,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:47,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:35:47,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:35:47,548 INFO L87 Difference]: Start difference. First operand 13940 states and 53939 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:49,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:49,368 INFO L93 Difference]: Finished difference Result 19597 states and 71188 transitions. [2021-04-15 05:35:49,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 05:35:49,371 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:35:49,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:49,413 INFO L225 Difference]: With dead ends: 19597 [2021-04-15 05:35:49,414 INFO L226 Difference]: Without dead ends: 19597 [2021-04-15 05:35:49,414 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1084.3ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 05:35:49,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19597 states. [2021-04-15 05:35:49,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19597 to 13893. [2021-04-15 05:35:49,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13893 states, 13892 states have (on average 3.8620069104520587) internal successors, (53651), 13892 states have internal predecessors, (53651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:49,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13893 states to 13893 states and 53651 transitions. [2021-04-15 05:35:49,813 INFO L78 Accepts]: Start accepts. Automaton has 13893 states and 53651 transitions. Word has length 28 [2021-04-15 05:35:49,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:49,814 INFO L480 AbstractCegarLoop]: Abstraction has 13893 states and 53651 transitions. [2021-04-15 05:35:49,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 13893 states and 53651 transitions. [2021-04-15 05:35:49,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:35:49,840 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:49,840 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:50,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-04-15 05:35:50,043 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:50,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:50,043 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 112 times [2021-04-15 05:35:50,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:50,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383185641] [2021-04-15 05:35:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:50,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:50,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383185641] [2021-04-15 05:35:50,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412886825] [2021-04-15 05:35:50,128 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:50,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:35:50,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:35:50,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:35:50,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:50,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:50,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:35:50,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583014787] [2021-04-15 05:35:50,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:35:50,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:50,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:35:50,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:35:50,392 INFO L87 Difference]: Start difference. First operand 13893 states and 53651 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:52,191 INFO L93 Difference]: Finished difference Result 20900 states and 76357 transitions. [2021-04-15 05:35:52,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 05:35:52,194 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:35:52,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:52,246 INFO L225 Difference]: With dead ends: 20900 [2021-04-15 05:35:52,246 INFO L226 Difference]: Without dead ends: 20900 [2021-04-15 05:35:52,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1030.7ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 05:35:52,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20900 states. [2021-04-15 05:35:52,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20900 to 14606. [2021-04-15 05:35:52,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14606 states, 14605 states have (on average 3.848134200616227) internal successors, (56202), 14605 states have internal predecessors, (56202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14606 states to 14606 states and 56202 transitions. [2021-04-15 05:35:52,625 INFO L78 Accepts]: Start accepts. Automaton has 14606 states and 56202 transitions. Word has length 28 [2021-04-15 05:35:52,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:52,625 INFO L480 AbstractCegarLoop]: Abstraction has 14606 states and 56202 transitions. [2021-04-15 05:35:52,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:52,625 INFO L276 IsEmpty]: Start isEmpty. Operand 14606 states and 56202 transitions. [2021-04-15 05:35:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:35:52,652 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:52,653 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:52,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:52,853 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:52,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:52,853 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 113 times [2021-04-15 05:35:52,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:52,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803868563] [2021-04-15 05:35:52,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:52,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803868563] [2021-04-15 05:35:52,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776802215] [2021-04-15 05:35:52,945 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:52,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:35:52,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:35:52,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:35:52,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:53,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:53,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-04-15 05:35:53,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235566314] [2021-04-15 05:35:53,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:35:53,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:53,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:35:53,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:35:53,247 INFO L87 Difference]: Start difference. First operand 14606 states and 56202 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:55,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:35:55,635 INFO L93 Difference]: Finished difference Result 23435 states and 84344 transitions. [2021-04-15 05:35:55,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 05:35:55,638 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:35:55,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:35:55,695 INFO L225 Difference]: With dead ends: 23435 [2021-04-15 05:35:55,695 INFO L226 Difference]: Without dead ends: 23435 [2021-04-15 05:35:55,696 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1373.5ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 05:35:55,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23435 states. [2021-04-15 05:35:56,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23435 to 14836. [2021-04-15 05:35:56,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14836 states, 14835 states have (on average 3.8591843613077184) internal successors, (57251), 14835 states have internal predecessors, (57251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:56,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14836 states to 14836 states and 57251 transitions. [2021-04-15 05:35:56,109 INFO L78 Accepts]: Start accepts. Automaton has 14836 states and 57251 transitions. Word has length 28 [2021-04-15 05:35:56,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:35:56,109 INFO L480 AbstractCegarLoop]: Abstraction has 14836 states and 57251 transitions. [2021-04-15 05:35:56,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:35:56,109 INFO L276 IsEmpty]: Start isEmpty. Operand 14836 states and 57251 transitions. [2021-04-15 05:35:56,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:35:56,138 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:35:56,138 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:35:56,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-04-15 05:35:56,339 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:35:56,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:35:56,339 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 80 times [2021-04-15 05:35:56,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:35:56,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395544286] [2021-04-15 05:35:56,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:35:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:35:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:56,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395544286] [2021-04-15 05:35:56,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068031718] [2021-04-15 05:35:56,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:35:56,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:35:56,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:35:56,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:35:56,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:35:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:35:56,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:35:56,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 05:35:56,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858981865] [2021-04-15 05:35:56,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:35:56,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:35:56,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:35:56,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:35:56,806 INFO L87 Difference]: Start difference. First operand 14836 states and 57251 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:00,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:36:00,599 INFO L93 Difference]: Finished difference Result 41598 states and 149527 transitions. [2021-04-15 05:36:00,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-04-15 05:36:00,599 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:36:00,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:36:00,715 INFO L225 Difference]: With dead ends: 41598 [2021-04-15 05:36:00,715 INFO L226 Difference]: Without dead ends: 41598 [2021-04-15 05:36:00,716 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 2427.3ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-04-15 05:36:00,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41598 states. [2021-04-15 05:36:01,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41598 to 16192. [2021-04-15 05:36:01,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16192 states, 16191 states have (on average 3.905564819961707) internal successors, (63235), 16191 states have internal predecessors, (63235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:01,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16192 states to 16192 states and 63235 transitions. [2021-04-15 05:36:01,507 INFO L78 Accepts]: Start accepts. Automaton has 16192 states and 63235 transitions. Word has length 28 [2021-04-15 05:36:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:36:01,507 INFO L480 AbstractCegarLoop]: Abstraction has 16192 states and 63235 transitions. [2021-04-15 05:36:01,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:01,507 INFO L276 IsEmpty]: Start isEmpty. Operand 16192 states and 63235 transitions. [2021-04-15 05:36:01,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:36:01,536 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:36:01,536 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:36:01,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:01,736 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:36:01,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:36:01,737 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 81 times [2021-04-15 05:36:01,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:36:01,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244623113] [2021-04-15 05:36:01,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:36:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:36:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:36:01,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244623113] [2021-04-15 05:36:01,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502606559] [2021-04-15 05:36:01,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:01,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 05:36:01,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:36:01,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:36:01,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:36:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:36:02,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:36:02,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 05:36:02,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108699505] [2021-04-15 05:36:02,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:36:02,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:36:02,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:36:02,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:36:02,195 INFO L87 Difference]: Start difference. First operand 16192 states and 63235 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:06,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:36:06,043 INFO L93 Difference]: Finished difference Result 40544 states and 146786 transitions. [2021-04-15 05:36:06,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-04-15 05:36:06,043 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:36:06,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:36:06,149 INFO L225 Difference]: With dead ends: 40544 [2021-04-15 05:36:06,149 INFO L226 Difference]: Without dead ends: 40544 [2021-04-15 05:36:06,150 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 2489.3ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-04-15 05:36:06,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40544 states. [2021-04-15 05:36:06,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40544 to 16160. [2021-04-15 05:36:06,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16160 states, 16159 states have (on average 3.9019122470449905) internal successors, (63051), 16159 states have internal predecessors, (63051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:06,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16160 states to 16160 states and 63051 transitions. [2021-04-15 05:36:06,937 INFO L78 Accepts]: Start accepts. Automaton has 16160 states and 63051 transitions. Word has length 28 [2021-04-15 05:36:06,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:36:06,937 INFO L480 AbstractCegarLoop]: Abstraction has 16160 states and 63051 transitions. [2021-04-15 05:36:06,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:06,937 INFO L276 IsEmpty]: Start isEmpty. Operand 16160 states and 63051 transitions. [2021-04-15 05:36:06,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:36:06,965 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:36:06,965 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:36:07,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-04-15 05:36:07,166 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:36:07,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:36:07,167 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 114 times [2021-04-15 05:36:07,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:36:07,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168852312] [2021-04-15 05:36:07,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:36:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:36:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:36:07,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168852312] [2021-04-15 05:36:07,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029964014] [2021-04-15 05:36:07,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:07,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:36:07,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:36:07,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:36:07,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:36:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:36:07,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:36:07,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-04-15 05:36:07,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534987413] [2021-04-15 05:36:07,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:36:07,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:36:07,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:36:07,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:36:07,525 INFO L87 Difference]: Start difference. First operand 16160 states and 63051 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:08,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:36:08,272 INFO L93 Difference]: Finished difference Result 25110 states and 96518 transitions. [2021-04-15 05:36:08,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 05:36:08,274 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:36:08,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:36:08,340 INFO L225 Difference]: With dead ends: 25110 [2021-04-15 05:36:08,340 INFO L226 Difference]: Without dead ends: 25063 [2021-04-15 05:36:08,341 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 338.7ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:36:08,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25063 states. [2021-04-15 05:36:08,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25063 to 20843. [2021-04-15 05:36:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20843 states, 20842 states have (on average 3.909125803665675) internal successors, (81474), 20842 states have internal predecessors, (81474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:08,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20843 states to 20843 states and 81474 transitions. [2021-04-15 05:36:08,810 INFO L78 Accepts]: Start accepts. Automaton has 20843 states and 81474 transitions. Word has length 28 [2021-04-15 05:36:08,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:36:08,810 INFO L480 AbstractCegarLoop]: Abstraction has 20843 states and 81474 transitions. [2021-04-15 05:36:08,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:08,810 INFO L276 IsEmpty]: Start isEmpty. Operand 20843 states and 81474 transitions. [2021-04-15 05:36:08,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:36:08,844 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:36:08,844 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:36:09,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-04-15 05:36:09,045 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:36:09,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:36:09,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 115 times [2021-04-15 05:36:09,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:36:09,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139644358] [2021-04-15 05:36:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:36:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:36:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:36:09,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139644358] [2021-04-15 05:36:09,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053880681] [2021-04-15 05:36:09,135 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:36:09,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:36:09,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:36:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:36:09,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:36:09,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:36:09,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362026847] [2021-04-15 05:36:09,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:36:09,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:36:09,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:36:09,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:36:09,356 INFO L87 Difference]: Start difference. First operand 20843 states and 81474 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:09,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:36:09,892 INFO L93 Difference]: Finished difference Result 23598 states and 89846 transitions. [2021-04-15 05:36:09,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:36:09,894 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:36:09,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:36:09,951 INFO L225 Difference]: With dead ends: 23598 [2021-04-15 05:36:09,951 INFO L226 Difference]: Without dead ends: 23598 [2021-04-15 05:36:09,951 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 275.2ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:36:09,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23598 states. [2021-04-15 05:36:10,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23598 to 20346. [2021-04-15 05:36:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20346 states, 20345 states have (on average 3.8978618825264193) internal successors, (79302), 20345 states have internal predecessors, (79302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20346 states to 20346 states and 79302 transitions. [2021-04-15 05:36:10,588 INFO L78 Accepts]: Start accepts. Automaton has 20346 states and 79302 transitions. Word has length 28 [2021-04-15 05:36:10,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:36:10,588 INFO L480 AbstractCegarLoop]: Abstraction has 20346 states and 79302 transitions. [2021-04-15 05:36:10,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:10,588 INFO L276 IsEmpty]: Start isEmpty. Operand 20346 states and 79302 transitions. [2021-04-15 05:36:10,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:36:10,620 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:36:10,620 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:36:10,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-04-15 05:36:10,821 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:36:10,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:36:10,821 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 116 times [2021-04-15 05:36:10,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:36:10,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323251406] [2021-04-15 05:36:10,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:36:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:36:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:36:10,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323251406] [2021-04-15 05:36:10,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159937475] [2021-04-15 05:36:10,925 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:10,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:36:10,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:36:10,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:36:10,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:36:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:36:11,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:36:11,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-04-15 05:36:11,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498529829] [2021-04-15 05:36:11,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:36:11,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:36:11,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:36:11,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:36:11,318 INFO L87 Difference]: Start difference. First operand 20346 states and 79302 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:13,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:36:13,817 INFO L93 Difference]: Finished difference Result 32302 states and 119801 transitions. [2021-04-15 05:36:13,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 05:36:13,820 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:36:13,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:36:13,912 INFO L225 Difference]: With dead ends: 32302 [2021-04-15 05:36:13,912 INFO L226 Difference]: Without dead ends: 32302 [2021-04-15 05:36:13,913 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1484.0ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 05:36:13,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32302 states. [2021-04-15 05:36:14,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32302 to 20412. [2021-04-15 05:36:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20412 states, 20411 states have (on average 3.895938464553427) internal successors, (79520), 20411 states have internal predecessors, (79520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:14,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20412 states to 20412 states and 79520 transitions. [2021-04-15 05:36:14,892 INFO L78 Accepts]: Start accepts. Automaton has 20412 states and 79520 transitions. Word has length 28 [2021-04-15 05:36:14,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:36:14,892 INFO L480 AbstractCegarLoop]: Abstraction has 20412 states and 79520 transitions. [2021-04-15 05:36:14,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:14,893 INFO L276 IsEmpty]: Start isEmpty. Operand 20412 states and 79520 transitions. [2021-04-15 05:36:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:36:14,928 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:36:14,928 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:36:15,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-04-15 05:36:15,128 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:36:15,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:36:15,129 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 117 times [2021-04-15 05:36:15,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:36:15,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930966399] [2021-04-15 05:36:15,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:36:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:36:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:36:15,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930966399] [2021-04-15 05:36:15,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970367800] [2021-04-15 05:36:15,260 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:15,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:36:15,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:36:15,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:36:15,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:36:15,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:36:15,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:36:15,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-04-15 05:36:15,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019017701] [2021-04-15 05:36:15,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:36:15,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:36:15,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:36:15,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:36:15,695 INFO L87 Difference]: Start difference. First operand 20412 states and 79520 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:19,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:36:19,922 INFO L93 Difference]: Finished difference Result 41452 states and 151987 transitions. [2021-04-15 05:36:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-04-15 05:36:19,939 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:36:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:36:20,064 INFO L225 Difference]: With dead ends: 41452 [2021-04-15 05:36:20,064 INFO L226 Difference]: Without dead ends: 41452 [2021-04-15 05:36:20,064 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 2681.3ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-04-15 05:36:20,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41452 states. [2021-04-15 05:36:20,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41452 to 20417. [2021-04-15 05:36:20,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20417 states, 20416 states have (on average 3.8979721786833856) internal successors, (79581), 20416 states have internal predecessors, (79581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:20,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20417 states to 20417 states and 79581 transitions. [2021-04-15 05:36:20,826 INFO L78 Accepts]: Start accepts. Automaton has 20417 states and 79581 transitions. Word has length 28 [2021-04-15 05:36:20,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:36:20,826 INFO L480 AbstractCegarLoop]: Abstraction has 20417 states and 79581 transitions. [2021-04-15 05:36:20,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:20,826 INFO L276 IsEmpty]: Start isEmpty. Operand 20417 states and 79581 transitions. [2021-04-15 05:36:20,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:36:20,861 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:36:20,862 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:36:21,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:21,062 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:36:21,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:36:21,062 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 118 times [2021-04-15 05:36:21,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:36:21,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164988856] [2021-04-15 05:36:21,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:36:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:36:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:36:21,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164988856] [2021-04-15 05:36:21,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098133829] [2021-04-15 05:36:21,172 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:21,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:36:21,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:36:21,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:36:21,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:36:21,395 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-04-15 05:36:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:36:21,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:36:21,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-04-15 05:36:21,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662713241] [2021-04-15 05:36:21,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:36:21,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:36:21,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:36:21,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:36:21,679 INFO L87 Difference]: Start difference. First operand 20417 states and 79581 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:25,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:36:25,650 INFO L93 Difference]: Finished difference Result 41128 states and 151472 transitions. [2021-04-15 05:36:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-04-15 05:36:25,654 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:36:25,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:36:25,782 INFO L225 Difference]: With dead ends: 41128 [2021-04-15 05:36:25,782 INFO L226 Difference]: Without dead ends: 41128 [2021-04-15 05:36:25,782 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 2597.0ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-04-15 05:36:25,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41128 states. [2021-04-15 05:36:26,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41128 to 20205. [2021-04-15 05:36:26,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20205 states, 20204 states have (on average 3.8903187487626214) internal successors, (78600), 20204 states have internal predecessors, (78600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20205 states to 20205 states and 78600 transitions. [2021-04-15 05:36:26,637 INFO L78 Accepts]: Start accepts. Automaton has 20205 states and 78600 transitions. Word has length 28 [2021-04-15 05:36:26,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:36:26,637 INFO L480 AbstractCegarLoop]: Abstraction has 20205 states and 78600 transitions. [2021-04-15 05:36:26,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:26,637 INFO L276 IsEmpty]: Start isEmpty. Operand 20205 states and 78600 transitions. [2021-04-15 05:36:26,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:36:26,793 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:36:26,794 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:36:27,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-04-15 05:36:27,009 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:36:27,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:36:27,009 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 119 times [2021-04-15 05:36:27,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:36:27,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392716253] [2021-04-15 05:36:27,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:36:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:36:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:36:27,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392716253] [2021-04-15 05:36:27,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449284822] [2021-04-15 05:36:27,092 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:27,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:36:27,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:36:27,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:36:27,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:36:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:36:27,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:36:27,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-04-15 05:36:27,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523331863] [2021-04-15 05:36:27,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:36:27,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:36:27,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:36:27,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:36:27,377 INFO L87 Difference]: Start difference. First operand 20205 states and 78600 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:28,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:36:28,015 INFO L93 Difference]: Finished difference Result 29714 states and 111113 transitions. [2021-04-15 05:36:28,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 05:36:28,018 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:36:28,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:36:28,225 INFO L225 Difference]: With dead ends: 29714 [2021-04-15 05:36:28,225 INFO L226 Difference]: Without dead ends: 29697 [2021-04-15 05:36:28,225 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 327.9ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:36:28,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29697 states. [2021-04-15 05:36:28,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29697 to 20476. [2021-04-15 05:36:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20476 states, 20475 states have (on average 3.895775335775336) internal successors, (79766), 20475 states have internal predecessors, (79766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20476 states to 20476 states and 79766 transitions. [2021-04-15 05:36:28,787 INFO L78 Accepts]: Start accepts. Automaton has 20476 states and 79766 transitions. Word has length 28 [2021-04-15 05:36:28,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:36:28,787 INFO L480 AbstractCegarLoop]: Abstraction has 20476 states and 79766 transitions. [2021-04-15 05:36:28,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:28,787 INFO L276 IsEmpty]: Start isEmpty. Operand 20476 states and 79766 transitions. [2021-04-15 05:36:28,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:36:28,823 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:36:28,823 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:36:29,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:29,024 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:36:29,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:36:29,024 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 120 times [2021-04-15 05:36:29,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:36:29,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33100472] [2021-04-15 05:36:29,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:36:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:36:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:36:29,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33100472] [2021-04-15 05:36:29,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071323007] [2021-04-15 05:36:29,133 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:29,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:36:29,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:36:29,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:36:29,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:36:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:36:29,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:36:29,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-04-15 05:36:29,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975552978] [2021-04-15 05:36:29,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:36:29,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:36:29,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:36:29,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:36:29,530 INFO L87 Difference]: Start difference. First operand 20476 states and 79766 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:30,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:36:30,201 INFO L93 Difference]: Finished difference Result 31499 states and 116678 transitions. [2021-04-15 05:36:30,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:36:30,204 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:36:30,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:36:30,293 INFO L225 Difference]: With dead ends: 31499 [2021-04-15 05:36:30,293 INFO L226 Difference]: Without dead ends: 31499 [2021-04-15 05:36:30,293 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 387.9ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:36:30,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31499 states. [2021-04-15 05:36:30,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31499 to 20145. [2021-04-15 05:36:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20145 states, 20144 states have (on average 3.8810563939634632) internal successors, (78180), 20144 states have internal predecessors, (78180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:30,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20145 states to 20145 states and 78180 transitions. [2021-04-15 05:36:30,960 INFO L78 Accepts]: Start accepts. Automaton has 20145 states and 78180 transitions. Word has length 28 [2021-04-15 05:36:30,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:36:30,960 INFO L480 AbstractCegarLoop]: Abstraction has 20145 states and 78180 transitions. [2021-04-15 05:36:30,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:30,961 INFO L276 IsEmpty]: Start isEmpty. Operand 20145 states and 78180 transitions. [2021-04-15 05:36:30,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:36:30,996 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:36:30,997 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:36:31,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-04-15 05:36:31,197 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:36:31,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:36:31,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 121 times [2021-04-15 05:36:31,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:36:31,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180719526] [2021-04-15 05:36:31,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:36:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:36:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:36:31,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180719526] [2021-04-15 05:36:31,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105506940] [2021-04-15 05:36:31,312 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:36:31,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:36:31,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:36:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:36:31,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:36:31,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-04-15 05:36:31,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631392085] [2021-04-15 05:36:31,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:36:31,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:36:31,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:36:31,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:36:31,630 INFO L87 Difference]: Start difference. First operand 20145 states and 78180 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:34,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:36:34,003 INFO L93 Difference]: Finished difference Result 29825 states and 110934 transitions. [2021-04-15 05:36:34,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-04-15 05:36:34,006 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:36:34,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:36:34,089 INFO L225 Difference]: With dead ends: 29825 [2021-04-15 05:36:34,090 INFO L226 Difference]: Without dead ends: 29825 [2021-04-15 05:36:34,090 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1284.3ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:36:34,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29825 states. [2021-04-15 05:36:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29825 to 20193. [2021-04-15 05:36:34,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20193 states, 20192 states have (on average 3.879457210776545) internal successors, (78334), 20192 states have internal predecessors, (78334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:34,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20193 states to 20193 states and 78334 transitions. [2021-04-15 05:36:34,827 INFO L78 Accepts]: Start accepts. Automaton has 20193 states and 78334 transitions. Word has length 28 [2021-04-15 05:36:34,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:36:34,827 INFO L480 AbstractCegarLoop]: Abstraction has 20193 states and 78334 transitions. [2021-04-15 05:36:34,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:34,827 INFO L276 IsEmpty]: Start isEmpty. Operand 20193 states and 78334 transitions. [2021-04-15 05:36:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:36:34,862 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:36:34,862 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:36:35,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:35,065 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:36:35,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:36:35,065 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 122 times [2021-04-15 05:36:35,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:36:35,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431519646] [2021-04-15 05:36:35,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:36:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:36:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:36:35,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431519646] [2021-04-15 05:36:35,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639477791] [2021-04-15 05:36:35,194 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:35,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:36:35,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:36:35,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:36:35,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:36:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:36:35,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:36:35,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-04-15 05:36:35,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892615990] [2021-04-15 05:36:35,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:36:35,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:36:35,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:36:35,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:36:35,570 INFO L87 Difference]: Start difference. First operand 20193 states and 78334 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:38,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:36:38,769 INFO L93 Difference]: Finished difference Result 31497 states and 115770 transitions. [2021-04-15 05:36:38,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-04-15 05:36:38,772 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:36:38,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:36:38,859 INFO L225 Difference]: With dead ends: 31497 [2021-04-15 05:36:38,859 INFO L226 Difference]: Without dead ends: 31497 [2021-04-15 05:36:38,859 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 1895.5ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-04-15 05:36:38,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31497 states. [2021-04-15 05:36:39,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31497 to 20733. [2021-04-15 05:36:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20733 states, 20732 states have (on average 3.8584796449932472) internal successors, (79994), 20732 states have internal predecessors, (79994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:39,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20733 states to 20733 states and 79994 transitions. [2021-04-15 05:36:39,546 INFO L78 Accepts]: Start accepts. Automaton has 20733 states and 79994 transitions. Word has length 28 [2021-04-15 05:36:39,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:36:39,546 INFO L480 AbstractCegarLoop]: Abstraction has 20733 states and 79994 transitions. [2021-04-15 05:36:39,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:39,546 INFO L276 IsEmpty]: Start isEmpty. Operand 20733 states and 79994 transitions. [2021-04-15 05:36:39,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:36:39,582 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:36:39,582 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:36:39,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:39,783 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:36:39,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:36:39,783 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 123 times [2021-04-15 05:36:39,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:36:39,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993001672] [2021-04-15 05:36:39,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:36:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:36:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:36:39,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993001672] [2021-04-15 05:36:39,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67249384] [2021-04-15 05:36:39,930 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:39,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:36:39,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:36:39,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:36:39,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:36:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:36:40,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:36:40,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-04-15 05:36:40,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254580196] [2021-04-15 05:36:40,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:36:40,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:36:40,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:36:40,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:36:40,263 INFO L87 Difference]: Start difference. First operand 20733 states and 79994 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:42,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:36:42,778 INFO L93 Difference]: Finished difference Result 30547 states and 113289 transitions. [2021-04-15 05:36:42,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-04-15 05:36:42,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:36:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:36:42,866 INFO L225 Difference]: With dead ends: 30547 [2021-04-15 05:36:42,866 INFO L226 Difference]: Without dead ends: 30543 [2021-04-15 05:36:42,866 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 1644.8ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 05:36:42,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30543 states. [2021-04-15 05:36:43,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30543 to 20625. [2021-04-15 05:36:43,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20625 states, 20624 states have (on average 3.861132660977502) internal successors, (79632), 20624 states have internal predecessors, (79632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:43,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20625 states to 20625 states and 79632 transitions. [2021-04-15 05:36:43,609 INFO L78 Accepts]: Start accepts. Automaton has 20625 states and 79632 transitions. Word has length 28 [2021-04-15 05:36:43,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:36:43,609 INFO L480 AbstractCegarLoop]: Abstraction has 20625 states and 79632 transitions. [2021-04-15 05:36:43,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand 20625 states and 79632 transitions. [2021-04-15 05:36:43,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:36:43,646 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:36:43,646 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:36:43,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:43,847 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:36:43,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:36:43,847 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 124 times [2021-04-15 05:36:43,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:36:43,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333729564] [2021-04-15 05:36:43,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:36:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:36:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:36:43,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333729564] [2021-04-15 05:36:43,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739219500] [2021-04-15 05:36:43,982 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:44,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:36:44,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:36:44,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:36:44,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:36:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 05:36:44,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:36:44,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-04-15 05:36:44,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262773956] [2021-04-15 05:36:44,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:36:44,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:36:44,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:36:44,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:36:44,317 INFO L87 Difference]: Start difference. First operand 20625 states and 79632 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:44,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:36:44,878 INFO L93 Difference]: Finished difference Result 25637 states and 95562 transitions. [2021-04-15 05:36:44,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:36:44,881 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:36:44,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:36:45,146 INFO L225 Difference]: With dead ends: 25637 [2021-04-15 05:36:45,147 INFO L226 Difference]: Without dead ends: 25637 [2021-04-15 05:36:45,147 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 380.5ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:36:45,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25637 states. [2021-04-15 05:36:45,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25637 to 20910. [2021-04-15 05:36:45,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20910 states, 20909 states have (on average 3.8524080539480607) internal successors, (80550), 20909 states have internal predecessors, (80550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20910 states to 20910 states and 80550 transitions. [2021-04-15 05:36:45,618 INFO L78 Accepts]: Start accepts. Automaton has 20910 states and 80550 transitions. Word has length 28 [2021-04-15 05:36:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:36:45,619 INFO L480 AbstractCegarLoop]: Abstraction has 20910 states and 80550 transitions. [2021-04-15 05:36:45,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:45,619 INFO L276 IsEmpty]: Start isEmpty. Operand 20910 states and 80550 transitions. [2021-04-15 05:36:45,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:36:45,655 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:36:45,655 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:36:45,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-04-15 05:36:45,856 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:36:45,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:36:45,856 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 125 times [2021-04-15 05:36:45,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:36:45,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952837251] [2021-04-15 05:36:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:36:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:36:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:36:46,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952837251] [2021-04-15 05:36:46,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658626564] [2021-04-15 05:36:46,155 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:46,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:36:46,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:36:46,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:36:46,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:36:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:36:46,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:36:46,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-04-15 05:36:46,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578525567] [2021-04-15 05:36:46,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:36:46,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:36:46,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:36:46,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:36:46,446 INFO L87 Difference]: Start difference. First operand 20910 states and 80550 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:48,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:36:48,613 INFO L93 Difference]: Finished difference Result 31417 states and 115177 transitions. [2021-04-15 05:36:48,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 05:36:48,616 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:36:48,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:36:48,696 INFO L225 Difference]: With dead ends: 31417 [2021-04-15 05:36:48,696 INFO L226 Difference]: Without dead ends: 31417 [2021-04-15 05:36:48,697 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 1319.2ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 05:36:48,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31417 states. [2021-04-15 05:36:49,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31417 to 22542. [2021-04-15 05:36:49,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22542 states, 22541 states have (on average 3.8634488265826716) internal successors, (87086), 22541 states have internal predecessors, (87086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22542 states to 22542 states and 87086 transitions. [2021-04-15 05:36:49,524 INFO L78 Accepts]: Start accepts. Automaton has 22542 states and 87086 transitions. Word has length 28 [2021-04-15 05:36:49,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:36:49,524 INFO L480 AbstractCegarLoop]: Abstraction has 22542 states and 87086 transitions. [2021-04-15 05:36:49,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:49,525 INFO L276 IsEmpty]: Start isEmpty. Operand 22542 states and 87086 transitions. [2021-04-15 05:36:49,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:36:49,584 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:36:49,584 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:36:49,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-04-15 05:36:49,784 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:36:49,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:36:49,785 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 126 times [2021-04-15 05:36:49,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:36:49,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900025500] [2021-04-15 05:36:49,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:36:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:36:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:36:49,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900025500] [2021-04-15 05:36:49,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866479689] [2021-04-15 05:36:49,906 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:49,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:36:49,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:36:49,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:36:49,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:36:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:36:50,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:36:50,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-04-15 05:36:50,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937720561] [2021-04-15 05:36:50,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:36:50,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:36:50,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:36:50,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:36:50,172 INFO L87 Difference]: Start difference. First operand 22542 states and 87086 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:36:52,190 INFO L93 Difference]: Finished difference Result 29674 states and 110683 transitions. [2021-04-15 05:36:52,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 05:36:52,195 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:36:52,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:36:52,304 INFO L225 Difference]: With dead ends: 29674 [2021-04-15 05:36:52,304 INFO L226 Difference]: Without dead ends: 29662 [2021-04-15 05:36:52,305 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1175.9ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 05:36:52,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29662 states. [2021-04-15 05:36:53,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29662 to 22694. [2021-04-15 05:36:53,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22694 states, 22693 states have (on average 3.858017890979597) internal successors, (87550), 22693 states have internal predecessors, (87550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22694 states to 22694 states and 87550 transitions. [2021-04-15 05:36:53,151 INFO L78 Accepts]: Start accepts. Automaton has 22694 states and 87550 transitions. Word has length 28 [2021-04-15 05:36:53,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:36:53,151 INFO L480 AbstractCegarLoop]: Abstraction has 22694 states and 87550 transitions. [2021-04-15 05:36:53,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:53,151 INFO L276 IsEmpty]: Start isEmpty. Operand 22694 states and 87550 transitions. [2021-04-15 05:36:53,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:36:53,193 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:36:53,194 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:36:53,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-04-15 05:36:53,394 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:36:53,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:36:53,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 127 times [2021-04-15 05:36:53,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:36:53,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992250056] [2021-04-15 05:36:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:36:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:36:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:36:53,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992250056] [2021-04-15 05:36:53,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142486550] [2021-04-15 05:36:53,490 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:36:53,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:36:53,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:36:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:36:53,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:36:53,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-15 05:36:53,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291711071] [2021-04-15 05:36:53,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:36:53,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:36:53,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:36:53,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:36:53,876 INFO L87 Difference]: Start difference. First operand 22694 states and 87550 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:54,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:36:54,533 INFO L93 Difference]: Finished difference Result 25953 states and 98507 transitions. [2021-04-15 05:36:54,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 05:36:54,536 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:36:54,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:36:54,610 INFO L225 Difference]: With dead ends: 25953 [2021-04-15 05:36:54,610 INFO L226 Difference]: Without dead ends: 25953 [2021-04-15 05:36:54,610 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 350.9ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:36:54,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25953 states. [2021-04-15 05:36:55,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25953 to 23497. [2021-04-15 05:36:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23497 states, 23496 states have (on average 3.852953694245829) internal successors, (90529), 23496 states have internal predecessors, (90529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23497 states to 23497 states and 90529 transitions. [2021-04-15 05:36:55,254 INFO L78 Accepts]: Start accepts. Automaton has 23497 states and 90529 transitions. Word has length 28 [2021-04-15 05:36:55,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:36:55,255 INFO L480 AbstractCegarLoop]: Abstraction has 23497 states and 90529 transitions. [2021-04-15 05:36:55,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:55,255 INFO L276 IsEmpty]: Start isEmpty. Operand 23497 states and 90529 transitions. [2021-04-15 05:36:55,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:36:55,294 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:36:55,295 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:36:55,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-04-15 05:36:55,495 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:36:55,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:36:55,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 128 times [2021-04-15 05:36:55,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:36:55,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467728810] [2021-04-15 05:36:55,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:36:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:36:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:36:55,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467728810] [2021-04-15 05:36:55,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487763369] [2021-04-15 05:36:55,629 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:55,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:36:55,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:36:55,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:36:55,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:36:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:36:55,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:36:55,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-04-15 05:36:55,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989676577] [2021-04-15 05:36:55,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:36:55,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:36:55,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:36:55,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:36:55,958 INFO L87 Difference]: Start difference. First operand 23497 states and 90529 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:36:58,399 INFO L93 Difference]: Finished difference Result 31449 states and 116111 transitions. [2021-04-15 05:36:58,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 05:36:58,399 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:36:58,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:36:58,496 INFO L225 Difference]: With dead ends: 31449 [2021-04-15 05:36:58,496 INFO L226 Difference]: Without dead ends: 31449 [2021-04-15 05:36:58,497 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1445.7ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 05:36:58,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31449 states. [2021-04-15 05:36:59,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31449 to 24701. [2021-04-15 05:36:59,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24701 states, 24700 states have (on average 3.8202024291497976) internal successors, (94359), 24700 states have internal predecessors, (94359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24701 states to 24701 states and 94359 transitions. [2021-04-15 05:36:59,243 INFO L78 Accepts]: Start accepts. Automaton has 24701 states and 94359 transitions. Word has length 28 [2021-04-15 05:36:59,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:36:59,243 INFO L480 AbstractCegarLoop]: Abstraction has 24701 states and 94359 transitions. [2021-04-15 05:36:59,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:36:59,243 INFO L276 IsEmpty]: Start isEmpty. Operand 24701 states and 94359 transitions. [2021-04-15 05:36:59,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:36:59,285 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:36:59,286 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:36:59,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-04-15 05:36:59,486 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:36:59,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:36:59,486 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 129 times [2021-04-15 05:36:59,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:36:59,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740263957] [2021-04-15 05:36:59,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:36:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:36:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:36:59,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740263957] [2021-04-15 05:36:59,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595495589] [2021-04-15 05:36:59,593 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:36:59,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 05:36:59,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:36:59,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:36:59,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:36:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:36:59,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:36:59,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-04-15 05:36:59,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214727436] [2021-04-15 05:36:59,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:36:59,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:36:59,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:36:59,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:36:59,883 INFO L87 Difference]: Start difference. First operand 24701 states and 94359 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:01,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:37:01,903 INFO L93 Difference]: Finished difference Result 30571 states and 113768 transitions. [2021-04-15 05:37:01,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 05:37:01,906 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:37:01,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:37:01,991 INFO L225 Difference]: With dead ends: 30571 [2021-04-15 05:37:01,992 INFO L226 Difference]: Without dead ends: 30563 [2021-04-15 05:37:01,992 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1028.4ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 05:37:02,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30563 states. [2021-04-15 05:37:02,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30563 to 24523. [2021-04-15 05:37:02,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24523 states, 24522 states have (on average 3.826278443846342) internal successors, (93828), 24522 states have internal predecessors, (93828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24523 states to 24523 states and 93828 transitions. [2021-04-15 05:37:02,760 INFO L78 Accepts]: Start accepts. Automaton has 24523 states and 93828 transitions. Word has length 28 [2021-04-15 05:37:02,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:37:02,760 INFO L480 AbstractCegarLoop]: Abstraction has 24523 states and 93828 transitions. [2021-04-15 05:37:02,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:02,760 INFO L276 IsEmpty]: Start isEmpty. Operand 24523 states and 93828 transitions. [2021-04-15 05:37:02,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:37:02,800 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:37:02,801 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:37:03,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:03,001 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:37:03,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:37:03,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 130 times [2021-04-15 05:37:03,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:37:03,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400475815] [2021-04-15 05:37:03,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:37:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:37:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:03,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400475815] [2021-04-15 05:37:03,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42828168] [2021-04-15 05:37:03,116 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:03,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:37:03,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:37:03,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:37:03,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:37:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:03,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:37:03,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-04-15 05:37:03,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143992174] [2021-04-15 05:37:03,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:37:03,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:37:03,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:37:03,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:37:03,447 INFO L87 Difference]: Start difference. First operand 24523 states and 93828 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:05,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:37:05,604 INFO L93 Difference]: Finished difference Result 32405 states and 119336 transitions. [2021-04-15 05:37:05,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 05:37:05,604 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:37:05,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:37:05,862 INFO L225 Difference]: With dead ends: 32405 [2021-04-15 05:37:05,862 INFO L226 Difference]: Without dead ends: 32405 [2021-04-15 05:37:05,862 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1338.7ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 05:37:05,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32405 states. [2021-04-15 05:37:06,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32405 to 25505. [2021-04-15 05:37:06,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25505 states, 25504 states have (on average 3.802423149309912) internal successors, (96977), 25504 states have internal predecessors, (96977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:06,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25505 states to 25505 states and 96977 transitions. [2021-04-15 05:37:06,597 INFO L78 Accepts]: Start accepts. Automaton has 25505 states and 96977 transitions. Word has length 28 [2021-04-15 05:37:06,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:37:06,597 INFO L480 AbstractCegarLoop]: Abstraction has 25505 states and 96977 transitions. [2021-04-15 05:37:06,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:06,597 INFO L276 IsEmpty]: Start isEmpty. Operand 25505 states and 96977 transitions. [2021-04-15 05:37:06,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:37:06,637 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:37:06,637 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:37:06,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-04-15 05:37:06,838 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:37:06,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:37:06,838 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 131 times [2021-04-15 05:37:06,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:37:06,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249827682] [2021-04-15 05:37:06,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:37:06,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:37:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:06,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249827682] [2021-04-15 05:37:06,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565027999] [2021-04-15 05:37:06,948 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:06,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:37:06,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:37:06,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:37:06,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:37:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:07,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:37:07,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-04-15 05:37:07,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571318541] [2021-04-15 05:37:07,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:37:07,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:37:07,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:37:07,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:37:07,246 INFO L87 Difference]: Start difference. First operand 25505 states and 96977 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:08,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:37:08,327 INFO L93 Difference]: Finished difference Result 31168 states and 117592 transitions. [2021-04-15 05:37:08,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:37:08,330 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:37:08,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:37:08,412 INFO L225 Difference]: With dead ends: 31168 [2021-04-15 05:37:08,412 INFO L226 Difference]: Without dead ends: 31155 [2021-04-15 05:37:08,412 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 452.7ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:37:08,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31155 states. [2021-04-15 05:37:09,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31155 to 29628. [2021-04-15 05:37:09,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29628 states, 29627 states have (on average 3.819927768589462) internal successors, (113173), 29627 states have internal predecessors, (113173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:09,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29628 states to 29628 states and 113173 transitions. [2021-04-15 05:37:09,203 INFO L78 Accepts]: Start accepts. Automaton has 29628 states and 113173 transitions. Word has length 28 [2021-04-15 05:37:09,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:37:09,203 INFO L480 AbstractCegarLoop]: Abstraction has 29628 states and 113173 transitions. [2021-04-15 05:37:09,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:09,203 INFO L276 IsEmpty]: Start isEmpty. Operand 29628 states and 113173 transitions. [2021-04-15 05:37:09,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:37:09,430 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:37:09,430 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:37:09,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:09,641 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:37:09,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:37:09,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 132 times [2021-04-15 05:37:09,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:37:09,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509964385] [2021-04-15 05:37:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:37:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:37:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:09,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509964385] [2021-04-15 05:37:09,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057010108] [2021-04-15 05:37:09,752 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:09,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:37:09,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:37:09,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:37:09,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:37:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:10,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:37:10,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-04-15 05:37:10,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881337767] [2021-04-15 05:37:10,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:37:10,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:37:10,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:37:10,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:37:10,006 INFO L87 Difference]: Start difference. First operand 29628 states and 113173 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:11,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:37:11,055 INFO L93 Difference]: Finished difference Result 32631 states and 122504 transitions. [2021-04-15 05:37:11,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:37:11,058 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:37:11,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:37:11,147 INFO L225 Difference]: With dead ends: 32631 [2021-04-15 05:37:11,147 INFO L226 Difference]: Without dead ends: 32631 [2021-04-15 05:37:11,147 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 473.3ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:37:11,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32631 states. [2021-04-15 05:37:11,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32631 to 29373. [2021-04-15 05:37:11,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29373 states, 29372 states have (on average 3.816355712923873) internal successors, (112094), 29372 states have internal predecessors, (112094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:11,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29373 states to 29373 states and 112094 transitions. [2021-04-15 05:37:11,942 INFO L78 Accepts]: Start accepts. Automaton has 29373 states and 112094 transitions. Word has length 28 [2021-04-15 05:37:11,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:37:11,942 INFO L480 AbstractCegarLoop]: Abstraction has 29373 states and 112094 transitions. [2021-04-15 05:37:11,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:11,942 INFO L276 IsEmpty]: Start isEmpty. Operand 29373 states and 112094 transitions. [2021-04-15 05:37:11,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:37:11,993 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:37:11,993 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:37:12,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:12,194 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:37:12,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:37:12,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 133 times [2021-04-15 05:37:12,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:37:12,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491967552] [2021-04-15 05:37:12,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:37:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:37:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:12,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491967552] [2021-04-15 05:37:12,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852823450] [2021-04-15 05:37:12,290 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:37:12,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:37:12,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:37:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:12,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:37:12,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-04-15 05:37:12,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229282320] [2021-04-15 05:37:12,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:37:12,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:37:12,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:37:12,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:37:12,553 INFO L87 Difference]: Start difference. First operand 29373 states and 112094 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:14,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:37:14,450 INFO L93 Difference]: Finished difference Result 35986 states and 133856 transitions. [2021-04-15 05:37:14,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 05:37:14,453 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:37:14,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:37:14,553 INFO L225 Difference]: With dead ends: 35986 [2021-04-15 05:37:14,553 INFO L226 Difference]: Without dead ends: 35978 [2021-04-15 05:37:14,554 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1087.3ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 05:37:14,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35978 states. [2021-04-15 05:37:15,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35978 to 29339. [2021-04-15 05:37:15,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29339 states, 29338 states have (on average 3.8167905106005864) internal successors, (111977), 29338 states have internal predecessors, (111977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:15,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29339 states to 29339 states and 111977 transitions. [2021-04-15 05:37:15,423 INFO L78 Accepts]: Start accepts. Automaton has 29339 states and 111977 transitions. Word has length 28 [2021-04-15 05:37:15,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:37:15,423 INFO L480 AbstractCegarLoop]: Abstraction has 29339 states and 111977 transitions. [2021-04-15 05:37:15,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:15,423 INFO L276 IsEmpty]: Start isEmpty. Operand 29339 states and 111977 transitions. [2021-04-15 05:37:15,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:37:15,476 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:37:15,476 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:37:15,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:15,677 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:37:15,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:37:15,677 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 134 times [2021-04-15 05:37:15,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:37:15,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834485430] [2021-04-15 05:37:15,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:37:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:37:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:37:15,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834485430] [2021-04-15 05:37:15,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691898834] [2021-04-15 05:37:15,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:15,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:37:15,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:37:15,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:37:15,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:37:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:37:16,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:37:16,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-04-15 05:37:16,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529134015] [2021-04-15 05:37:16,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:37:16,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:37:16,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:37:16,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:37:16,046 INFO L87 Difference]: Start difference. First operand 29339 states and 111977 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:17,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:37:17,353 INFO L93 Difference]: Finished difference Result 32185 states and 121439 transitions. [2021-04-15 05:37:17,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 05:37:17,356 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:37:17,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:37:17,441 INFO L225 Difference]: With dead ends: 32185 [2021-04-15 05:37:17,441 INFO L226 Difference]: Without dead ends: 32185 [2021-04-15 05:37:17,441 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 636.0ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:37:17,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32185 states. [2021-04-15 05:37:18,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32185 to 29871. [2021-04-15 05:37:18,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29871 states, 29870 states have (on average 3.8152326749246734) internal successors, (113961), 29870 states have internal predecessors, (113961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:18,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29871 states to 29871 states and 113961 transitions. [2021-04-15 05:37:18,268 INFO L78 Accepts]: Start accepts. Automaton has 29871 states and 113961 transitions. Word has length 28 [2021-04-15 05:37:18,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:37:18,268 INFO L480 AbstractCegarLoop]: Abstraction has 29871 states and 113961 transitions. [2021-04-15 05:37:18,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:18,269 INFO L276 IsEmpty]: Start isEmpty. Operand 29871 states and 113961 transitions. [2021-04-15 05:37:18,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:37:18,325 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:37:18,325 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:37:18,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:18,526 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:37:18,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:37:18,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 135 times [2021-04-15 05:37:18,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:37:18,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817001595] [2021-04-15 05:37:18,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:37:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:37:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:37:18,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817001595] [2021-04-15 05:37:18,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995793560] [2021-04-15 05:37:18,635 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:18,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:37:18,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:37:18,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:37:18,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:37:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:37:18,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:37:18,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-04-15 05:37:18,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220097334] [2021-04-15 05:37:18,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:37:18,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:37:18,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:37:18,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:37:18,916 INFO L87 Difference]: Start difference. First operand 29871 states and 113961 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:37:20,792 INFO L93 Difference]: Finished difference Result 36821 states and 137037 transitions. [2021-04-15 05:37:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 05:37:20,795 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:37:20,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:37:20,892 INFO L225 Difference]: With dead ends: 36821 [2021-04-15 05:37:20,892 INFO L226 Difference]: Without dead ends: 36797 [2021-04-15 05:37:20,892 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 945.8ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 05:37:20,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36797 states. [2021-04-15 05:37:21,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36797 to 30043. [2021-04-15 05:37:21,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30043 states, 30042 states have (on average 3.811164369882165) internal successors, (114495), 30042 states have internal predecessors, (114495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:21,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30043 states to 30043 states and 114495 transitions. [2021-04-15 05:37:21,742 INFO L78 Accepts]: Start accepts. Automaton has 30043 states and 114495 transitions. Word has length 28 [2021-04-15 05:37:21,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:37:21,742 INFO L480 AbstractCegarLoop]: Abstraction has 30043 states and 114495 transitions. [2021-04-15 05:37:21,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:21,742 INFO L276 IsEmpty]: Start isEmpty. Operand 30043 states and 114495 transitions. [2021-04-15 05:37:21,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:37:21,796 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:37:21,796 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:37:21,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-04-15 05:37:21,997 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:37:21,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:37:21,997 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 136 times [2021-04-15 05:37:21,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:37:21,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717839484] [2021-04-15 05:37:21,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:37:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:37:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:22,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717839484] [2021-04-15 05:37:22,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249103969] [2021-04-15 05:37:22,134 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:22,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:37:22,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:37:22,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:37:22,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:37:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:22,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:37:22,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-04-15 05:37:22,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27037316] [2021-04-15 05:37:22,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:37:22,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:37:22,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:37:22,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:37:22,396 INFO L87 Difference]: Start difference. First operand 30043 states and 114495 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:24,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:37:24,021 INFO L93 Difference]: Finished difference Result 32599 states and 122907 transitions. [2021-04-15 05:37:24,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:37:24,024 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:37:24,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:37:24,149 INFO L225 Difference]: With dead ends: 32599 [2021-04-15 05:37:24,150 INFO L226 Difference]: Without dead ends: 32599 [2021-04-15 05:37:24,150 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 774.6ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:37:24,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32599 states. [2021-04-15 05:37:24,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32599 to 29969. [2021-04-15 05:37:24,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29969 states, 29968 states have (on average 3.812032835024026) internal successors, (114239), 29968 states have internal predecessors, (114239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:25,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29969 states to 29969 states and 114239 transitions. [2021-04-15 05:37:25,019 INFO L78 Accepts]: Start accepts. Automaton has 29969 states and 114239 transitions. Word has length 28 [2021-04-15 05:37:25,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:37:25,019 INFO L480 AbstractCegarLoop]: Abstraction has 29969 states and 114239 transitions. [2021-04-15 05:37:25,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:25,019 INFO L276 IsEmpty]: Start isEmpty. Operand 29969 states and 114239 transitions. [2021-04-15 05:37:25,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:37:25,076 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:37:25,076 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:37:25,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-04-15 05:37:25,276 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:37:25,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:37:25,277 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 137 times [2021-04-15 05:37:25,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:37:25,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999379877] [2021-04-15 05:37:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:37:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:37:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:25,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999379877] [2021-04-15 05:37:25,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141472971] [2021-04-15 05:37:25,430 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:25,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:37:25,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:37:25,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:37:25,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:37:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:25,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:37:25,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-04-15 05:37:25,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259133784] [2021-04-15 05:37:25,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:37:25,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:37:25,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:37:25,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:37:25,712 INFO L87 Difference]: Start difference. First operand 29969 states and 114239 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:27,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:37:27,698 INFO L93 Difference]: Finished difference Result 36744 states and 136778 transitions. [2021-04-15 05:37:27,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 05:37:27,701 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:37:27,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:37:27,803 INFO L225 Difference]: With dead ends: 36744 [2021-04-15 05:37:27,804 INFO L226 Difference]: Without dead ends: 36704 [2021-04-15 05:37:27,804 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1164.3ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 05:37:27,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36704 states. [2021-04-15 05:37:28,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36704 to 30125. [2021-04-15 05:37:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30125 states, 30124 states have (on average 3.8080932147125215) internal successors, (114715), 30124 states have internal predecessors, (114715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:28,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30125 states to 30125 states and 114715 transitions. [2021-04-15 05:37:28,909 INFO L78 Accepts]: Start accepts. Automaton has 30125 states and 114715 transitions. Word has length 28 [2021-04-15 05:37:28,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:37:28,909 INFO L480 AbstractCegarLoop]: Abstraction has 30125 states and 114715 transitions. [2021-04-15 05:37:28,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:28,909 INFO L276 IsEmpty]: Start isEmpty. Operand 30125 states and 114715 transitions. [2021-04-15 05:37:28,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:37:28,963 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:37:28,963 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:37:29,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-04-15 05:37:29,163 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:37:29,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:37:29,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 138 times [2021-04-15 05:37:29,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:37:29,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055656965] [2021-04-15 05:37:29,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:37:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:37:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:29,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055656965] [2021-04-15 05:37:29,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549446961] [2021-04-15 05:37:29,259 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:29,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:37:29,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:37:29,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:37:29,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:37:29,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:29,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:37:29,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 05:37:29,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76726128] [2021-04-15 05:37:29,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:37:29,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:37:29,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:37:29,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:37:29,653 INFO L87 Difference]: Start difference. First operand 30125 states and 114715 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:33,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:37:33,520 INFO L93 Difference]: Finished difference Result 68801 states and 253165 transitions. [2021-04-15 05:37:33,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-04-15 05:37:33,523 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:37:33,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:37:33,730 INFO L225 Difference]: With dead ends: 68801 [2021-04-15 05:37:33,730 INFO L226 Difference]: Without dead ends: 68801 [2021-04-15 05:37:33,730 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 2183.2ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-04-15 05:37:33,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68801 states. [2021-04-15 05:37:35,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68801 to 37809. [2021-04-15 05:37:35,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37809 states, 37808 states have (on average 3.8872460854845534) internal successors, (146969), 37808 states have internal predecessors, (146969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:35,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37809 states to 37809 states and 146969 transitions. [2021-04-15 05:37:35,433 INFO L78 Accepts]: Start accepts. Automaton has 37809 states and 146969 transitions. Word has length 28 [2021-04-15 05:37:35,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:37:35,433 INFO L480 AbstractCegarLoop]: Abstraction has 37809 states and 146969 transitions. [2021-04-15 05:37:35,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:35,433 INFO L276 IsEmpty]: Start isEmpty. Operand 37809 states and 146969 transitions. [2021-04-15 05:37:35,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:37:35,503 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:37:35,503 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:37:35,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-04-15 05:37:35,703 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:37:35,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:37:35,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 139 times [2021-04-15 05:37:35,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:37:35,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080152906] [2021-04-15 05:37:35,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:37:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:37:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:35,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080152906] [2021-04-15 05:37:35,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732489829] [2021-04-15 05:37:35,813 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:37:35,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:37:35,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:37:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:36,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:37:36,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 05:37:36,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261572149] [2021-04-15 05:37:36,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:37:36,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:37:36,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:37:36,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:37:36,258 INFO L87 Difference]: Start difference. First operand 37809 states and 146969 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:39,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:37:39,960 INFO L93 Difference]: Finished difference Result 68217 states and 251622 transitions. [2021-04-15 05:37:39,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-04-15 05:37:39,963 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:37:39,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:37:40,168 INFO L225 Difference]: With dead ends: 68217 [2021-04-15 05:37:40,168 INFO L226 Difference]: Without dead ends: 68217 [2021-04-15 05:37:40,169 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 2206.8ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-04-15 05:37:40,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68217 states. [2021-04-15 05:37:41,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68217 to 37806. [2021-04-15 05:37:41,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37806 states, 37805 states have (on average 3.8871842348895647) internal successors, (146955), 37805 states have internal predecessors, (146955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:41,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37806 states to 37806 states and 146955 transitions. [2021-04-15 05:37:41,815 INFO L78 Accepts]: Start accepts. Automaton has 37806 states and 146955 transitions. Word has length 28 [2021-04-15 05:37:41,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:37:41,815 INFO L480 AbstractCegarLoop]: Abstraction has 37806 states and 146955 transitions. [2021-04-15 05:37:41,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:41,815 INFO L276 IsEmpty]: Start isEmpty. Operand 37806 states and 146955 transitions. [2021-04-15 05:37:41,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:37:41,886 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:37:41,887 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:37:42,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:42,088 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:37:42,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:37:42,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 140 times [2021-04-15 05:37:42,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:37:42,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614705081] [2021-04-15 05:37:42,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:37:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:37:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:42,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614705081] [2021-04-15 05:37:42,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935422584] [2021-04-15 05:37:42,200 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:42,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:37:42,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:37:42,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:37:42,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:37:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:42,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:37:42,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-04-15 05:37:42,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575383605] [2021-04-15 05:37:42,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:37:42,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:37:42,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:37:42,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:37:42,642 INFO L87 Difference]: Start difference. First operand 37806 states and 146955 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:46,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:37:46,246 INFO L93 Difference]: Finished difference Result 63636 states and 236045 transitions. [2021-04-15 05:37:46,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-04-15 05:37:46,249 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:37:46,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:37:46,458 INFO L225 Difference]: With dead ends: 63636 [2021-04-15 05:37:46,458 INFO L226 Difference]: Without dead ends: 63636 [2021-04-15 05:37:46,459 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 2069.7ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-04-15 05:37:46,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63636 states. [2021-04-15 05:37:47,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63636 to 37828. [2021-04-15 05:37:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37828 states, 37827 states have (on average 3.8874349009966425) internal successors, (147050), 37827 states have internal predecessors, (147050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:48,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37828 states to 37828 states and 147050 transitions. [2021-04-15 05:37:48,171 INFO L78 Accepts]: Start accepts. Automaton has 37828 states and 147050 transitions. Word has length 28 [2021-04-15 05:37:48,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:37:48,171 INFO L480 AbstractCegarLoop]: Abstraction has 37828 states and 147050 transitions. [2021-04-15 05:37:48,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 37828 states and 147050 transitions. [2021-04-15 05:37:48,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:37:48,254 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:37:48,254 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:37:48,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-04-15 05:37:48,455 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:37:48,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:37:48,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 141 times [2021-04-15 05:37:48,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:37:48,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705286414] [2021-04-15 05:37:48,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:37:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:37:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:48,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705286414] [2021-04-15 05:37:48,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132486419] [2021-04-15 05:37:48,561 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:48,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:37:48,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:37:48,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:37:48,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:37:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:48,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:37:48,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-04-15 05:37:48,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681993515] [2021-04-15 05:37:48,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:37:48,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:37:48,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:37:48,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:37:48,944 INFO L87 Difference]: Start difference. First operand 37828 states and 147050 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:52,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:37:52,129 INFO L93 Difference]: Finished difference Result 62782 states and 233841 transitions. [2021-04-15 05:37:52,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-04-15 05:37:52,132 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:37:52,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:37:52,553 INFO L225 Difference]: With dead ends: 62782 [2021-04-15 05:37:52,553 INFO L226 Difference]: Without dead ends: 62774 [2021-04-15 05:37:52,554 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 1762.8ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 05:37:52,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62774 states. [2021-04-15 05:37:53,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62774 to 37828. [2021-04-15 05:37:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37828 states, 37827 states have (on average 3.8872762841356705) internal successors, (147044), 37827 states have internal predecessors, (147044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:53,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37828 states to 37828 states and 147044 transitions. [2021-04-15 05:37:53,872 INFO L78 Accepts]: Start accepts. Automaton has 37828 states and 147044 transitions. Word has length 28 [2021-04-15 05:37:53,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:37:53,872 INFO L480 AbstractCegarLoop]: Abstraction has 37828 states and 147044 transitions. [2021-04-15 05:37:53,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:53,873 INFO L276 IsEmpty]: Start isEmpty. Operand 37828 states and 147044 transitions. [2021-04-15 05:37:53,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:37:53,937 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:37:53,937 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:37:54,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:54,137 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:37:54,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:37:54,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 142 times [2021-04-15 05:37:54,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:37:54,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715453205] [2021-04-15 05:37:54,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:37:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:37:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:54,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715453205] [2021-04-15 05:37:54,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505289595] [2021-04-15 05:37:54,241 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:37:54,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:37:54,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:37:54,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:37:54,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:37:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:37:54,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:37:54,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 05:37:54,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3397616] [2021-04-15 05:37:54,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:37:54,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:37:54,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:37:54,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:37:54,657 INFO L87 Difference]: Start difference. First operand 37828 states and 147044 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:58,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:37:58,086 INFO L93 Difference]: Finished difference Result 62315 states and 232613 transitions. [2021-04-15 05:37:58,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-04-15 05:37:58,089 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:37:58,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:37:58,268 INFO L225 Difference]: With dead ends: 62315 [2021-04-15 05:37:58,268 INFO L226 Difference]: Without dead ends: 62315 [2021-04-15 05:37:58,268 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 1962.3ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 05:37:58,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62315 states. [2021-04-15 05:37:59,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62315 to 37836. [2021-04-15 05:37:59,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37836 states, 37835 states have (on average 3.887352980044932) internal successors, (147078), 37835 states have internal predecessors, (147078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:59,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37836 states to 37836 states and 147078 transitions. [2021-04-15 05:37:59,775 INFO L78 Accepts]: Start accepts. Automaton has 37836 states and 147078 transitions. Word has length 28 [2021-04-15 05:37:59,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:37:59,776 INFO L480 AbstractCegarLoop]: Abstraction has 37836 states and 147078 transitions. [2021-04-15 05:37:59,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:37:59,776 INFO L276 IsEmpty]: Start isEmpty. Operand 37836 states and 147078 transitions. [2021-04-15 05:37:59,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:37:59,840 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:37:59,840 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:00,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-04-15 05:38:00,041 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:00,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:00,041 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 143 times [2021-04-15 05:38:00,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:00,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74637216] [2021-04-15 05:38:00,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:00,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74637216] [2021-04-15 05:38:00,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804630759] [2021-04-15 05:38:00,141 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:00,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:38:00,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:00,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:38:00,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:00,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:00,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 05:38:00,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425393238] [2021-04-15 05:38:00,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:38:00,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:00,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:38:00,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:38:00,584 INFO L87 Difference]: Start difference. First operand 37836 states and 147078 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:03,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:03,787 INFO L93 Difference]: Finished difference Result 62082 states and 232029 transitions. [2021-04-15 05:38:03,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-04-15 05:38:03,790 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:38:03,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:03,963 INFO L225 Difference]: With dead ends: 62082 [2021-04-15 05:38:03,963 INFO L226 Difference]: Without dead ends: 62074 [2021-04-15 05:38:03,964 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1702.6ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 05:38:04,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62074 states. [2021-04-15 05:38:05,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62074 to 37836. [2021-04-15 05:38:05,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37836 states, 37835 states have (on average 3.8873001189374916) internal successors, (147076), 37835 states have internal predecessors, (147076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:05,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37836 states to 37836 states and 147076 transitions. [2021-04-15 05:38:05,403 INFO L78 Accepts]: Start accepts. Automaton has 37836 states and 147076 transitions. Word has length 28 [2021-04-15 05:38:05,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:05,403 INFO L480 AbstractCegarLoop]: Abstraction has 37836 states and 147076 transitions. [2021-04-15 05:38:05,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:05,403 INFO L276 IsEmpty]: Start isEmpty. Operand 37836 states and 147076 transitions. [2021-04-15 05:38:05,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:38:05,476 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:05,476 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:05,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:05,676 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:05,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:05,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 144 times [2021-04-15 05:38:05,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:05,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091801985] [2021-04-15 05:38:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:05,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091801985] [2021-04-15 05:38:05,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713464503] [2021-04-15 05:38:05,807 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:05,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:38:05,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:05,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:38:05,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:06,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:06,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-04-15 05:38:06,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678806152] [2021-04-15 05:38:06,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:38:06,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:06,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:38:06,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:38:06,413 INFO L87 Difference]: Start difference. First operand 37836 states and 147076 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:09,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:09,699 INFO L93 Difference]: Finished difference Result 61556 states and 228528 transitions. [2021-04-15 05:38:09,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-04-15 05:38:09,702 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:38:09,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:09,885 INFO L225 Difference]: With dead ends: 61556 [2021-04-15 05:38:09,885 INFO L226 Difference]: Without dead ends: 61556 [2021-04-15 05:38:09,886 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 2050.8ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-04-15 05:38:09,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61556 states. [2021-04-15 05:38:11,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61556 to 40635. [2021-04-15 05:38:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40635 states, 40634 states have (on average 3.8911748781808337) internal successors, (158114), 40634 states have internal predecessors, (158114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:11,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40635 states to 40635 states and 158114 transitions. [2021-04-15 05:38:11,395 INFO L78 Accepts]: Start accepts. Automaton has 40635 states and 158114 transitions. Word has length 28 [2021-04-15 05:38:11,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:11,395 INFO L480 AbstractCegarLoop]: Abstraction has 40635 states and 158114 transitions. [2021-04-15 05:38:11,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:11,395 INFO L276 IsEmpty]: Start isEmpty. Operand 40635 states and 158114 transitions. [2021-04-15 05:38:11,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:38:11,465 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:11,465 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:11,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:11,666 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:11,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:11,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 145 times [2021-04-15 05:38:11,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:11,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147234146] [2021-04-15 05:38:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:11,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147234146] [2021-04-15 05:38:11,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157817555] [2021-04-15 05:38:11,768 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:11,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:38:11,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:12,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:12,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-04-15 05:38:12,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181850738] [2021-04-15 05:38:12,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:38:12,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:12,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:38:12,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:38:12,106 INFO L87 Difference]: Start difference. First operand 40635 states and 158114 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:15,318 INFO L93 Difference]: Finished difference Result 61051 states and 227204 transitions. [2021-04-15 05:38:15,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-04-15 05:38:15,321 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:38:15,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:15,502 INFO L225 Difference]: With dead ends: 61051 [2021-04-15 05:38:15,502 INFO L226 Difference]: Without dead ends: 61043 [2021-04-15 05:38:15,502 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1716.3ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 05:38:15,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61043 states. [2021-04-15 05:38:16,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61043 to 40349. [2021-04-15 05:38:16,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40349 states, 40348 states have (on average 3.8968226430058492) internal successors, (157229), 40348 states have internal predecessors, (157229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:17,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40349 states to 40349 states and 157229 transitions. [2021-04-15 05:38:17,211 INFO L78 Accepts]: Start accepts. Automaton has 40349 states and 157229 transitions. Word has length 28 [2021-04-15 05:38:17,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:17,211 INFO L480 AbstractCegarLoop]: Abstraction has 40349 states and 157229 transitions. [2021-04-15 05:38:17,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:17,211 INFO L276 IsEmpty]: Start isEmpty. Operand 40349 states and 157229 transitions. [2021-04-15 05:38:17,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:38:17,280 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:17,280 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:17,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:17,481 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:17,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:17,481 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 146 times [2021-04-15 05:38:17,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:17,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698157334] [2021-04-15 05:38:17,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:17,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698157334] [2021-04-15 05:38:17,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175161255] [2021-04-15 05:38:17,589 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:17,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:38:17,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:17,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:38:17,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:17,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:17,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-04-15 05:38:17,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378210339] [2021-04-15 05:38:17,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:38:17,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:17,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:38:17,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:38:17,934 INFO L87 Difference]: Start difference. First operand 40349 states and 157229 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:20,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:20,128 INFO L93 Difference]: Finished difference Result 59500 states and 222919 transitions. [2021-04-15 05:38:20,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 05:38:20,131 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:38:20,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:20,309 INFO L225 Difference]: With dead ends: 59500 [2021-04-15 05:38:20,309 INFO L226 Difference]: Without dead ends: 59476 [2021-04-15 05:38:20,310 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1226.1ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:38:20,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59476 states. [2021-04-15 05:38:21,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59476 to 40255. [2021-04-15 05:38:21,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40255 states, 40254 states have (on average 3.896805286431162) internal successors, (156862), 40254 states have internal predecessors, (156862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40255 states to 40255 states and 156862 transitions. [2021-04-15 05:38:21,866 INFO L78 Accepts]: Start accepts. Automaton has 40255 states and 156862 transitions. Word has length 28 [2021-04-15 05:38:21,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:21,867 INFO L480 AbstractCegarLoop]: Abstraction has 40255 states and 156862 transitions. [2021-04-15 05:38:21,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:21,867 INFO L276 IsEmpty]: Start isEmpty. Operand 40255 states and 156862 transitions. [2021-04-15 05:38:21,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:38:21,935 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:21,935 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:22,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:22,136 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:22,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:22,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 147 times [2021-04-15 05:38:22,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:22,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304489936] [2021-04-15 05:38:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:22,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304489936] [2021-04-15 05:38:22,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288136024] [2021-04-15 05:38:22,249 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:22,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:38:22,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:22,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:38:22,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:22,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:22,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 05:38:22,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095246293] [2021-04-15 05:38:22,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:38:22,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:22,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:38:22,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:38:22,724 INFO L87 Difference]: Start difference. First operand 40255 states and 156862 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:26,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:26,224 INFO L93 Difference]: Finished difference Result 60726 states and 226343 transitions. [2021-04-15 05:38:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-04-15 05:38:26,227 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:38:26,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:26,397 INFO L225 Difference]: With dead ends: 60726 [2021-04-15 05:38:26,397 INFO L226 Difference]: Without dead ends: 60726 [2021-04-15 05:38:26,398 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 2101.1ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 05:38:26,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60726 states. [2021-04-15 05:38:27,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60726 to 40351. [2021-04-15 05:38:27,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40351 states, 40350 states have (on average 3.8953159851301113) internal successors, (157176), 40350 states have internal predecessors, (157176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:27,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40351 states to 40351 states and 157176 transitions. [2021-04-15 05:38:27,872 INFO L78 Accepts]: Start accepts. Automaton has 40351 states and 157176 transitions. Word has length 28 [2021-04-15 05:38:27,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:27,872 INFO L480 AbstractCegarLoop]: Abstraction has 40351 states and 157176 transitions. [2021-04-15 05:38:27,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:27,872 INFO L276 IsEmpty]: Start isEmpty. Operand 40351 states and 157176 transitions. [2021-04-15 05:38:28,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:38:28,190 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:28,190 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:28,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-04-15 05:38:28,411 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:28,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:28,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 148 times [2021-04-15 05:38:28,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:28,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786990898] [2021-04-15 05:38:28,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:28,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786990898] [2021-04-15 05:38:28,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647503114] [2021-04-15 05:38:28,541 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:28,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:38:28,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:28,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:38:28,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:28,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:28,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 05:38:28,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650626775] [2021-04-15 05:38:28,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:38:28,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:28,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:38:28,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:38:28,918 INFO L87 Difference]: Start difference. First operand 40351 states and 157176 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:31,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:31,718 INFO L93 Difference]: Finished difference Result 60292 states and 225103 transitions. [2021-04-15 05:38:31,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 05:38:31,721 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:38:31,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:31,893 INFO L225 Difference]: With dead ends: 60292 [2021-04-15 05:38:31,894 INFO L226 Difference]: Without dead ends: 60284 [2021-04-15 05:38:31,894 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 1656.8ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 05:38:31,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60284 states. [2021-04-15 05:38:33,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60284 to 40283. [2021-04-15 05:38:33,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40283 states, 40282 states have (on average 3.8966287671913014) internal successors, (156964), 40282 states have internal predecessors, (156964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:33,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40283 states to 40283 states and 156964 transitions. [2021-04-15 05:38:33,381 INFO L78 Accepts]: Start accepts. Automaton has 40283 states and 156964 transitions. Word has length 28 [2021-04-15 05:38:33,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:33,381 INFO L480 AbstractCegarLoop]: Abstraction has 40283 states and 156964 transitions. [2021-04-15 05:38:33,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:33,381 INFO L276 IsEmpty]: Start isEmpty. Operand 40283 states and 156964 transitions. [2021-04-15 05:38:33,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:38:33,449 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:33,449 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:33,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-04-15 05:38:33,653 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:33,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:33,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 149 times [2021-04-15 05:38:33,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:33,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320938083] [2021-04-15 05:38:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:33,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320938083] [2021-04-15 05:38:33,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676352263] [2021-04-15 05:38:33,762 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:33,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:38:33,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:33,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:38:33,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:34,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:34,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-04-15 05:38:34,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163788384] [2021-04-15 05:38:34,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:38:34,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:34,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:38:34,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:38:34,140 INFO L87 Difference]: Start difference. First operand 40283 states and 156964 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:36,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:36,757 INFO L93 Difference]: Finished difference Result 59023 states and 221592 transitions. [2021-04-15 05:38:36,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 05:38:36,761 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:38:36,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:36,952 INFO L225 Difference]: With dead ends: 59023 [2021-04-15 05:38:36,952 INFO L226 Difference]: Without dead ends: 58999 [2021-04-15 05:38:36,952 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1255.8ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 05:38:37,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58999 states. [2021-04-15 05:38:38,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58999 to 40259. [2021-04-15 05:38:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40259 states, 40258 states have (on average 3.896765860201699) internal successors, (156876), 40258 states have internal predecessors, (156876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:38,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40259 states to 40259 states and 156876 transitions. [2021-04-15 05:38:38,552 INFO L78 Accepts]: Start accepts. Automaton has 40259 states and 156876 transitions. Word has length 28 [2021-04-15 05:38:38,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:38,552 INFO L480 AbstractCegarLoop]: Abstraction has 40259 states and 156876 transitions. [2021-04-15 05:38:38,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:38,552 INFO L276 IsEmpty]: Start isEmpty. Operand 40259 states and 156876 transitions. [2021-04-15 05:38:38,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:38:38,622 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:38,622 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:38,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-04-15 05:38:38,822 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:38,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:38,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1119483464, now seen corresponding path program 150 times [2021-04-15 05:38:38,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:38,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253909737] [2021-04-15 05:38:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:38,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253909737] [2021-04-15 05:38:38,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408020237] [2021-04-15 05:38:38,950 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:38,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:38:38,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:38,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:38:38,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:39,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:39,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-04-15 05:38:39,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122763731] [2021-04-15 05:38:39,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:38:39,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:39,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:38:39,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:38:39,286 INFO L87 Difference]: Start difference. First operand 40259 states and 156876 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:43,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:43,908 INFO L93 Difference]: Finished difference Result 62461 states and 231344 transitions. [2021-04-15 05:38:43,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-04-15 05:38:43,911 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:38:43,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:44,089 INFO L225 Difference]: With dead ends: 62461 [2021-04-15 05:38:44,089 INFO L226 Difference]: Without dead ends: 62461 [2021-04-15 05:38:44,090 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 2893.1ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-04-15 05:38:44,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62461 states. [2021-04-15 05:38:45,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62461 to 44583. [2021-04-15 05:38:45,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44583 states, 44582 states have (on average 3.8468888789197435) internal successors, (171502), 44582 states have internal predecessors, (171502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:45,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44583 states to 44583 states and 171502 transitions. [2021-04-15 05:38:45,763 INFO L78 Accepts]: Start accepts. Automaton has 44583 states and 171502 transitions. Word has length 28 [2021-04-15 05:38:45,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:45,764 INFO L480 AbstractCegarLoop]: Abstraction has 44583 states and 171502 transitions. [2021-04-15 05:38:45,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:45,764 INFO L276 IsEmpty]: Start isEmpty. Operand 44583 states and 171502 transitions. [2021-04-15 05:38:45,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:38:45,837 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:45,837 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:46,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:46,041 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:46,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:46,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1200859552, now seen corresponding path program 151 times [2021-04-15 05:38:46,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:46,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643815321] [2021-04-15 05:38:46,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:46,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643815321] [2021-04-15 05:38:46,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613674382] [2021-04-15 05:38:46,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:46,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:38:46,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:46,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:46,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-04-15 05:38:46,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685586112] [2021-04-15 05:38:46,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:38:46,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:46,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:38:46,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:38:46,489 INFO L87 Difference]: Start difference. First operand 44583 states and 171502 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:50,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:50,139 INFO L93 Difference]: Finished difference Result 61654 states and 229149 transitions. [2021-04-15 05:38:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-04-15 05:38:50,141 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:38:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:50,326 INFO L225 Difference]: With dead ends: 61654 [2021-04-15 05:38:50,326 INFO L226 Difference]: Without dead ends: 61646 [2021-04-15 05:38:50,326 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 2213.8ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-04-15 05:38:50,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61646 states. [2021-04-15 05:38:51,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61646 to 43473. [2021-04-15 05:38:51,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43473 states, 43472 states have (on average 3.8658216783216783) internal successors, (168055), 43472 states have internal predecessors, (168055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43473 states to 43473 states and 168055 transitions. [2021-04-15 05:38:51,754 INFO L78 Accepts]: Start accepts. Automaton has 43473 states and 168055 transitions. Word has length 28 [2021-04-15 05:38:51,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:51,754 INFO L480 AbstractCegarLoop]: Abstraction has 43473 states and 168055 transitions. [2021-04-15 05:38:51,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:51,754 INFO L276 IsEmpty]: Start isEmpty. Operand 43473 states and 168055 transitions. [2021-04-15 05:38:51,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:38:51,826 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:51,826 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:52,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-04-15 05:38:52,027 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:52,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:52,027 INFO L82 PathProgramCache]: Analyzing trace with hash -314232420, now seen corresponding path program 152 times [2021-04-15 05:38:52,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:52,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230971529] [2021-04-15 05:38:52,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:52,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230971529] [2021-04-15 05:38:52,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23001232] [2021-04-15 05:38:52,166 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:52,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:38:52,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:52,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:38:52,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:52,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:52,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-04-15 05:38:52,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640014431] [2021-04-15 05:38:52,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:38:52,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:52,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:38:52,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:38:52,488 INFO L87 Difference]: Start difference. First operand 43473 states and 168055 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:55,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:55,878 INFO L93 Difference]: Finished difference Result 59916 states and 224368 transitions. [2021-04-15 05:38:55,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-04-15 05:38:55,881 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:38:55,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:56,048 INFO L225 Difference]: With dead ends: 59916 [2021-04-15 05:38:56,049 INFO L226 Difference]: Without dead ends: 59892 [2021-04-15 05:38:56,049 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 2226.1ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-04-15 05:38:56,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59892 states. [2021-04-15 05:38:57,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59892 to 43485. [2021-04-15 05:38:57,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43485 states, 43484 states have (on average 3.8636969919970565) internal successors, (168009), 43484 states have internal predecessors, (168009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:57,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43485 states to 43485 states and 168009 transitions. [2021-04-15 05:38:57,537 INFO L78 Accepts]: Start accepts. Automaton has 43485 states and 168009 transitions. Word has length 28 [2021-04-15 05:38:57,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:57,537 INFO L480 AbstractCegarLoop]: Abstraction has 43485 states and 168009 transitions. [2021-04-15 05:38:57,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:57,537 INFO L276 IsEmpty]: Start isEmpty. Operand 43485 states and 168009 transitions. [2021-04-15 05:38:57,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:38:57,605 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:57,605 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:57,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:57,806 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:57,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:57,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1316197732, now seen corresponding path program 153 times [2021-04-15 05:38:57,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:57,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114687410] [2021-04-15 05:38:57,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:57,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114687410] [2021-04-15 05:38:57,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2859975] [2021-04-15 05:38:57,929 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:57,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:38:57,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:57,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:38:57,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:58,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:58,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-04-15 05:38:58,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108055958] [2021-04-15 05:38:58,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:38:58,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:58,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:38:58,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:38:58,239 INFO L87 Difference]: Start difference. First operand 43485 states and 168009 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:01,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:39:01,375 INFO L93 Difference]: Finished difference Result 61163 states and 227783 transitions. [2021-04-15 05:39:01,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-04-15 05:39:01,378 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:39:01,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:39:01,536 INFO L225 Difference]: With dead ends: 61163 [2021-04-15 05:39:01,536 INFO L226 Difference]: Without dead ends: 61123 [2021-04-15 05:39:01,536 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 1743.6ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 05:39:01,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61123 states. [2021-04-15 05:39:02,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61123 to 43617. [2021-04-15 05:39:02,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43617 states, 43616 states have (on average 3.863008987527513) internal successors, (168489), 43616 states have internal predecessors, (168489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:02,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43617 states to 43617 states and 168489 transitions. [2021-04-15 05:39:02,827 INFO L78 Accepts]: Start accepts. Automaton has 43617 states and 168489 transitions. Word has length 28 [2021-04-15 05:39:02,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:39:02,827 INFO L480 AbstractCegarLoop]: Abstraction has 43617 states and 168489 transitions. [2021-04-15 05:39:02,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 43617 states and 168489 transitions. [2021-04-15 05:39:02,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:39:02,895 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:39:02,895 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:39:03,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:39:03,096 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:39:03,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:39:03,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1262992088, now seen corresponding path program 154 times [2021-04-15 05:39:03,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:39:03,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692761995] [2021-04-15 05:39:03,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:39:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:39:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:39:03,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692761995] [2021-04-15 05:39:03,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485941701] [2021-04-15 05:39:03,222 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:39:03,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:39:03,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:39:03,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:39:03,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:39:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:39:03,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:39:03,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 05:39:03,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762834624] [2021-04-15 05:39:03,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:39:03,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:39:03,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:39:03,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:39:03,669 INFO L87 Difference]: Start difference. First operand 43617 states and 168489 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:06,168 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-04-15 05:39:08,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:39:08,071 INFO L93 Difference]: Finished difference Result 60432 states and 225635 transitions. [2021-04-15 05:39:08,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-04-15 05:39:08,074 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:39:08,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:39:08,238 INFO L225 Difference]: With dead ends: 60432 [2021-04-15 05:39:08,238 INFO L226 Difference]: Without dead ends: 60432 [2021-04-15 05:39:08,238 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 3069.8ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-04-15 05:39:08,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60432 states. [2021-04-15 05:39:09,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60432 to 44522. [2021-04-15 05:39:09,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44522 states, 44521 states have (on average 3.8534624109970577) internal successors, (171560), 44521 states have internal predecessors, (171560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:09,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44522 states to 44522 states and 171560 transitions. [2021-04-15 05:39:09,802 INFO L78 Accepts]: Start accepts. Automaton has 44522 states and 171560 transitions. Word has length 28 [2021-04-15 05:39:09,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:39:09,802 INFO L480 AbstractCegarLoop]: Abstraction has 44522 states and 171560 transitions. [2021-04-15 05:39:09,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:09,803 INFO L276 IsEmpty]: Start isEmpty. Operand 44522 states and 171560 transitions. [2021-04-15 05:39:09,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:39:09,872 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:39:09,872 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:39:10,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:39:10,077 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:39:10,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:39:10,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936054, now seen corresponding path program 155 times [2021-04-15 05:39:10,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:39:10,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384502545] [2021-04-15 05:39:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:39:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:39:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:39:10,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384502545] [2021-04-15 05:39:10,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846352925] [2021-04-15 05:39:10,216 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:39:10,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:39:10,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:39:10,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:39:10,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:39:10,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:39:10,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:39:10,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 05:39:10,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852683063] [2021-04-15 05:39:10,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:39:10,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:39:10,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:39:10,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:39:10,668 INFO L87 Difference]: Start difference. First operand 44522 states and 171560 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:14,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:39:14,227 INFO L93 Difference]: Finished difference Result 59813 states and 223888 transitions. [2021-04-15 05:39:14,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-04-15 05:39:14,229 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:39:14,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:39:14,654 INFO L225 Difference]: With dead ends: 59813 [2021-04-15 05:39:14,655 INFO L226 Difference]: Without dead ends: 59805 [2021-04-15 05:39:14,655 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 2327.4ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-04-15 05:39:14,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59805 states. [2021-04-15 05:39:15,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59805 to 44446. [2021-04-15 05:39:15,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44446 states, 44445 states have (on average 3.8547418157273032) internal successors, (171324), 44445 states have internal predecessors, (171324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44446 states to 44446 states and 171324 transitions. [2021-04-15 05:39:15,923 INFO L78 Accepts]: Start accepts. Automaton has 44446 states and 171324 transitions. Word has length 28 [2021-04-15 05:39:15,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:39:15,923 INFO L480 AbstractCegarLoop]: Abstraction has 44446 states and 171324 transitions. [2021-04-15 05:39:15,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:15,923 INFO L276 IsEmpty]: Start isEmpty. Operand 44446 states and 171324 transitions. [2021-04-15 05:39:15,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:39:15,993 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:39:15,993 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:39:16,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:39:16,194 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:39:16,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:39:16,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1638574064, now seen corresponding path program 156 times [2021-04-15 05:39:16,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:39:16,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8630727] [2021-04-15 05:39:16,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:39:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:39:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:39:16,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8630727] [2021-04-15 05:39:16,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145626844] [2021-04-15 05:39:16,323 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:39:16,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:39:16,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:39:16,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:39:16,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:39:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:39:16,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:39:16,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 05:39:16,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856939498] [2021-04-15 05:39:16,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:39:16,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:39:16,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:39:16,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:39:16,716 INFO L87 Difference]: Start difference. First operand 44446 states and 171324 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:20,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:39:20,112 INFO L93 Difference]: Finished difference Result 59290 states and 222642 transitions. [2021-04-15 05:39:20,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-04-15 05:39:20,115 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:39:20,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:39:20,282 INFO L225 Difference]: With dead ends: 59290 [2021-04-15 05:39:20,282 INFO L226 Difference]: Without dead ends: 59266 [2021-04-15 05:39:20,282 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1950.8ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 05:39:20,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59266 states. [2021-04-15 05:39:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59266 to 44432. [2021-04-15 05:39:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44432 states, 44431 states have (on average 3.8547185523620895) internal successors, (171269), 44431 states have internal predecessors, (171269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:21,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44432 states to 44432 states and 171269 transitions. [2021-04-15 05:39:21,686 INFO L78 Accepts]: Start accepts. Automaton has 44432 states and 171269 transitions. Word has length 28 [2021-04-15 05:39:21,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:39:21,686 INFO L480 AbstractCegarLoop]: Abstraction has 44432 states and 171269 transitions. [2021-04-15 05:39:21,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:21,686 INFO L276 IsEmpty]: Start isEmpty. Operand 44432 states and 171269 transitions. [2021-04-15 05:39:21,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:39:21,757 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:39:21,757 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:39:21,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:39:21,959 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:39:21,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:39:21,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1972807316, now seen corresponding path program 157 times [2021-04-15 05:39:21,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:39:21,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149209951] [2021-04-15 05:39:21,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:39:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:39:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:39:22,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149209951] [2021-04-15 05:39:22,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682335731] [2021-04-15 05:39:22,104 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:39:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:39:22,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:39:22,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:39:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:39:22,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:39:22,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-04-15 05:39:22,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977056261] [2021-04-15 05:39:22,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:39:22,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:39:22,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:39:22,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:39:22,733 INFO L87 Difference]: Start difference. First operand 44432 states and 171269 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:25,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:39:25,731 INFO L93 Difference]: Finished difference Result 59072 states and 221949 transitions. [2021-04-15 05:39:25,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-04-15 05:39:25,734 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:39:25,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:39:25,892 INFO L225 Difference]: With dead ends: 59072 [2021-04-15 05:39:25,892 INFO L226 Difference]: Without dead ends: 59032 [2021-04-15 05:39:25,892 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 2126.0ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 05:39:25,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59032 states. [2021-04-15 05:39:27,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59032 to 44781. [2021-04-15 05:39:27,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44781 states, 44780 states have (on average 3.856587762393926) internal successors, (172698), 44780 states have internal predecessors, (172698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:27,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44781 states to 44781 states and 172698 transitions. [2021-04-15 05:39:27,429 INFO L78 Accepts]: Start accepts. Automaton has 44781 states and 172698 transitions. Word has length 28 [2021-04-15 05:39:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:39:27,429 INFO L480 AbstractCegarLoop]: Abstraction has 44781 states and 172698 transitions. [2021-04-15 05:39:27,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 44781 states and 172698 transitions. [2021-04-15 05:39:27,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:39:27,501 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:39:27,501 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:39:27,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-04-15 05:39:27,702 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:39:27,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:39:27,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1825824890, now seen corresponding path program 158 times [2021-04-15 05:39:27,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:39:27,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991513396] [2021-04-15 05:39:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:39:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:39:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:39:27,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991513396] [2021-04-15 05:39:27,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303941300] [2021-04-15 05:39:27,830 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:39:27,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:39:27,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:39:27,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:39:27,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:39:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:39:28,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:39:28,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 05:39:28,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492756236] [2021-04-15 05:39:28,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:39:28,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:39:28,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:39:28,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:39:28,235 INFO L87 Difference]: Start difference. First operand 44781 states and 172698 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:31,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:39:31,839 INFO L93 Difference]: Finished difference Result 71883 states and 267354 transitions. [2021-04-15 05:39:31,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-04-15 05:39:31,843 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:39:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:39:32,031 INFO L225 Difference]: With dead ends: 71883 [2021-04-15 05:39:32,031 INFO L226 Difference]: Without dead ends: 71883 [2021-04-15 05:39:32,031 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 2068.0ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-04-15 05:39:32,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71883 states. [2021-04-15 05:39:33,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71883 to 45947. [2021-04-15 05:39:33,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45947 states, 45946 states have (on average 3.870913681278022) internal successors, (177853), 45946 states have internal predecessors, (177853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:33,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45947 states to 45947 states and 177853 transitions. [2021-04-15 05:39:33,479 INFO L78 Accepts]: Start accepts. Automaton has 45947 states and 177853 transitions. Word has length 28 [2021-04-15 05:39:33,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:39:33,480 INFO L480 AbstractCegarLoop]: Abstraction has 45947 states and 177853 transitions. [2021-04-15 05:39:33,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:33,480 INFO L276 IsEmpty]: Start isEmpty. Operand 45947 states and 177853 transitions. [2021-04-15 05:39:33,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:39:33,552 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:39:33,552 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:39:33,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-04-15 05:39:33,753 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:39:33,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:39:33,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1151103012, now seen corresponding path program 159 times [2021-04-15 05:39:33,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:39:33,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870864226] [2021-04-15 05:39:33,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:39:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:39:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:39:33,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870864226] [2021-04-15 05:39:33,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186435046] [2021-04-15 05:39:33,900 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:39:33,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:39:33,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:39:33,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:39:33,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:39:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:39:34,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:39:34,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 05:39:34,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711211449] [2021-04-15 05:39:34,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:39:34,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:39:34,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:39:34,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:39:34,316 INFO L87 Difference]: Start difference. First operand 45947 states and 177853 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:37,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:39:37,880 INFO L93 Difference]: Finished difference Result 65842 states and 248215 transitions. [2021-04-15 05:39:37,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-04-15 05:39:37,883 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:39:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:39:38,068 INFO L225 Difference]: With dead ends: 65842 [2021-04-15 05:39:38,068 INFO L226 Difference]: Without dead ends: 65842 [2021-04-15 05:39:38,068 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 1958.3ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 05:39:38,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65842 states. [2021-04-15 05:39:39,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65842 to 45977. [2021-04-15 05:39:39,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45977 states, 45976 states have (on average 3.8707151557334263) internal successors, (177960), 45976 states have internal predecessors, (177960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:39,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45977 states to 45977 states and 177960 transitions. [2021-04-15 05:39:39,653 INFO L78 Accepts]: Start accepts. Automaton has 45977 states and 177960 transitions. Word has length 28 [2021-04-15 05:39:39,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:39:39,653 INFO L480 AbstractCegarLoop]: Abstraction has 45977 states and 177960 transitions. [2021-04-15 05:39:39,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:39,654 INFO L276 IsEmpty]: Start isEmpty. Operand 45977 states and 177960 transitions. [2021-04-15 05:39:39,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:39:39,731 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:39:39,731 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:39:39,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-04-15 05:39:39,932 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:39:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:39:39,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1490504108, now seen corresponding path program 160 times [2021-04-15 05:39:39,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:39:39,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231447247] [2021-04-15 05:39:39,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:39:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:39:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:39:40,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231447247] [2021-04-15 05:39:40,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023954368] [2021-04-15 05:39:40,067 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:39:40,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:39:40,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:39:40,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:39:40,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:39:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:39:40,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:39:40,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 05:39:40,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359006194] [2021-04-15 05:39:40,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:39:40,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:39:40,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:39:40,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:39:40,553 INFO L87 Difference]: Start difference. First operand 45977 states and 177960 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:45,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:39:45,426 INFO L93 Difference]: Finished difference Result 66878 states and 251166 transitions. [2021-04-15 05:39:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-04-15 05:39:45,430 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:39:45,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:39:45,619 INFO L225 Difference]: With dead ends: 66878 [2021-04-15 05:39:45,619 INFO L226 Difference]: Without dead ends: 66878 [2021-04-15 05:39:45,619 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 3205.6ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-04-15 05:39:45,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66878 states. [2021-04-15 05:39:46,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66878 to 46241. [2021-04-15 05:39:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46241 states, 46240 states have (on average 3.867171280276817) internal successors, (178818), 46240 states have internal predecessors, (178818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46241 states to 46241 states and 178818 transitions. [2021-04-15 05:39:47,052 INFO L78 Accepts]: Start accepts. Automaton has 46241 states and 178818 transitions. Word has length 28 [2021-04-15 05:39:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:39:47,052 INFO L480 AbstractCegarLoop]: Abstraction has 46241 states and 178818 transitions. [2021-04-15 05:39:47,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 46241 states and 178818 transitions. [2021-04-15 05:39:47,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:39:47,125 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:39:47,125 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:39:47,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-04-15 05:39:47,326 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:39:47,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:39:47,326 INFO L82 PathProgramCache]: Analyzing trace with hash 152535046, now seen corresponding path program 161 times [2021-04-15 05:39:47,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:39:47,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054482284] [2021-04-15 05:39:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:39:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:39:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:39:47,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054482284] [2021-04-15 05:39:47,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770665578] [2021-04-15 05:39:47,727 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:39:47,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:39:47,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:39:47,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:39:47,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:39:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:39:48,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:39:48,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 05:39:48,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65330806] [2021-04-15 05:39:48,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:39:48,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:39:48,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:39:48,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:39:48,161 INFO L87 Difference]: Start difference. First operand 46241 states and 178818 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:52,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:39:52,338 INFO L93 Difference]: Finished difference Result 65887 states and 248347 transitions. [2021-04-15 05:39:52,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-04-15 05:39:52,341 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:39:52,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:39:52,523 INFO L225 Difference]: With dead ends: 65887 [2021-04-15 05:39:52,524 INFO L226 Difference]: Without dead ends: 65883 [2021-04-15 05:39:52,524 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 2570.0ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-04-15 05:39:52,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65883 states. [2021-04-15 05:39:53,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65883 to 45877. [2021-04-15 05:39:53,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45877 states, 45876 states have (on average 3.8709128956317027) internal successors, (177582), 45876 states have internal predecessors, (177582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45877 states to 45877 states and 177582 transitions. [2021-04-15 05:39:54,054 INFO L78 Accepts]: Start accepts. Automaton has 45877 states and 177582 transitions. Word has length 28 [2021-04-15 05:39:54,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:39:54,054 INFO L480 AbstractCegarLoop]: Abstraction has 45877 states and 177582 transitions. [2021-04-15 05:39:54,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:54,054 INFO L276 IsEmpty]: Start isEmpty. Operand 45877 states and 177582 transitions. [2021-04-15 05:39:54,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:39:54,126 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:39:54,126 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:39:54,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-04-15 05:39:54,326 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:39:54,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:39:54,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1936993134, now seen corresponding path program 162 times [2021-04-15 05:39:54,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:39:54,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887430552] [2021-04-15 05:39:54,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:39:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:39:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:39:54,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887430552] [2021-04-15 05:39:54,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155543337] [2021-04-15 05:39:54,462 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:39:54,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:39:54,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:39:54,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:39:54,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:39:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:39:54,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:39:54,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 05:39:54,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744903893] [2021-04-15 05:39:54,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:39:54,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:39:54,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:39:54,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:39:54,912 INFO L87 Difference]: Start difference. First operand 45877 states and 177582 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:57,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:39:57,662 INFO L93 Difference]: Finished difference Result 60177 states and 228553 transitions. [2021-04-15 05:39:57,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 05:39:57,666 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:39:57,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:39:57,846 INFO L225 Difference]: With dead ends: 60177 [2021-04-15 05:39:57,846 INFO L226 Difference]: Without dead ends: 60177 [2021-04-15 05:39:57,846 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1722.6ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 05:39:57,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60177 states. [2021-04-15 05:39:58,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60177 to 45893. [2021-04-15 05:39:59,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45893 states, 45892 states have (on average 3.8727882855399636) internal successors, (177730), 45892 states have internal predecessors, (177730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:59,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45893 states to 45893 states and 177730 transitions. [2021-04-15 05:39:59,148 INFO L78 Accepts]: Start accepts. Automaton has 45893 states and 177730 transitions. Word has length 28 [2021-04-15 05:39:59,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:39:59,148 INFO L480 AbstractCegarLoop]: Abstraction has 45893 states and 177730 transitions. [2021-04-15 05:39:59,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:39:59,149 INFO L276 IsEmpty]: Start isEmpty. Operand 45893 states and 177730 transitions. [2021-04-15 05:39:59,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:39:59,220 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:39:59,220 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:39:59,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:39:59,420 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:39:59,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:39:59,421 INFO L82 PathProgramCache]: Analyzing trace with hash -756673454, now seen corresponding path program 163 times [2021-04-15 05:39:59,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:39:59,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63340116] [2021-04-15 05:39:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:39:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:39:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:39:59,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63340116] [2021-04-15 05:39:59,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373617923] [2021-04-15 05:39:59,558 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:39:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:39:59,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:39:59,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:39:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:39:59,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:39:59,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 05:39:59,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744591527] [2021-04-15 05:39:59,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:39:59,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:39:59,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:39:59,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:39:59,984 INFO L87 Difference]: Start difference. First operand 45893 states and 177730 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:02,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:40:02,444 INFO L93 Difference]: Finished difference Result 59367 states and 226324 transitions. [2021-04-15 05:40:02,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 05:40:02,447 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:40:02,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:40:02,604 INFO L225 Difference]: With dead ends: 59367 [2021-04-15 05:40:02,604 INFO L226 Difference]: Without dead ends: 59355 [2021-04-15 05:40:02,604 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1353.9ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 05:40:02,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59355 states. [2021-04-15 05:40:03,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59355 to 45827. [2021-04-15 05:40:03,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45827 states, 45826 states have (on average 3.873936193427312) internal successors, (177527), 45826 states have internal predecessors, (177527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45827 states to 45827 states and 177527 transitions. [2021-04-15 05:40:04,000 INFO L78 Accepts]: Start accepts. Automaton has 45827 states and 177527 transitions. Word has length 28 [2021-04-15 05:40:04,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:40:04,000 INFO L480 AbstractCegarLoop]: Abstraction has 45827 states and 177527 transitions. [2021-04-15 05:40:04,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand 45827 states and 177527 transitions. [2021-04-15 05:40:04,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:40:04,073 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:40:04,073 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:40:04,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2021-04-15 05:40:04,274 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:40:04,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:40:04,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1537074702, now seen corresponding path program 164 times [2021-04-15 05:40:04,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:40:04,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567785576] [2021-04-15 05:40:04,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:40:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:40:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:40:04,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567785576] [2021-04-15 05:40:04,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493141810] [2021-04-15 05:40:04,453 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:40:04,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:40:04,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:40:04,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:40:04,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:40:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:40:04,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:40:04,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 05:40:04,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412920331] [2021-04-15 05:40:04,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:40:04,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:40:04,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:40:04,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:40:04,927 INFO L87 Difference]: Start difference. First operand 45827 states and 177527 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:06,740 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-04-15 05:40:07,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:40:07,222 INFO L93 Difference]: Finished difference Result 50560 states and 193090 transitions. [2021-04-15 05:40:07,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 05:40:07,225 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:40:07,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:40:07,362 INFO L225 Difference]: With dead ends: 50560 [2021-04-15 05:40:07,363 INFO L226 Difference]: Without dead ends: 50560 [2021-04-15 05:40:07,363 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1579.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:40:07,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50560 states. [2021-04-15 05:40:08,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50560 to 46035. [2021-04-15 05:40:08,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46035 states, 46034 states have (on average 3.871464569665899) internal successors, (178219), 46034 states have internal predecessors, (178219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46035 states to 46035 states and 178219 transitions. [2021-04-15 05:40:08,558 INFO L78 Accepts]: Start accepts. Automaton has 46035 states and 178219 transitions. Word has length 28 [2021-04-15 05:40:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:40:08,558 INFO L480 AbstractCegarLoop]: Abstraction has 46035 states and 178219 transitions. [2021-04-15 05:40:08,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 46035 states and 178219 transitions. [2021-04-15 05:40:08,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:40:08,629 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:40:08,629 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:40:08,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:40:08,830 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:40:08,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:40:08,830 INFO L82 PathProgramCache]: Analyzing trace with hash 538506736, now seen corresponding path program 165 times [2021-04-15 05:40:08,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:40:08,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053697534] [2021-04-15 05:40:08,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:40:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:40:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:40:08,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053697534] [2021-04-15 05:40:08,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753731720] [2021-04-15 05:40:08,958 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:40:08,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:40:08,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:40:08,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:40:08,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:40:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:40:09,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:40:09,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-04-15 05:40:09,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147696745] [2021-04-15 05:40:09,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:40:09,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:40:09,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:40:09,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:40:09,355 INFO L87 Difference]: Start difference. First operand 46035 states and 178219 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:11,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:40:11,150 INFO L93 Difference]: Finished difference Result 50371 states and 192582 transitions. [2021-04-15 05:40:11,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:40:11,153 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:40:11,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:40:11,293 INFO L225 Difference]: With dead ends: 50371 [2021-04-15 05:40:11,293 INFO L226 Difference]: Without dead ends: 50367 [2021-04-15 05:40:11,293 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 952.8ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:40:11,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50367 states. [2021-04-15 05:40:12,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50367 to 45975. [2021-04-15 05:40:12,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45975 states, 45974 states have (on average 3.8723408883281856) internal successors, (178027), 45974 states have internal predecessors, (178027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:12,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45975 states to 45975 states and 178027 transitions. [2021-04-15 05:40:12,543 INFO L78 Accepts]: Start accepts. Automaton has 45975 states and 178027 transitions. Word has length 28 [2021-04-15 05:40:12,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:40:12,543 INFO L480 AbstractCegarLoop]: Abstraction has 45975 states and 178027 transitions. [2021-04-15 05:40:12,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:12,543 INFO L276 IsEmpty]: Start isEmpty. Operand 45975 states and 178027 transitions. [2021-04-15 05:40:12,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:40:12,632 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:40:12,632 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:40:12,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:40:12,845 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:40:12,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:40:12,845 INFO L82 PathProgramCache]: Analyzing trace with hash 508703680, now seen corresponding path program 82 times [2021-04-15 05:40:12,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:40:12,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354013706] [2021-04-15 05:40:12,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:40:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:40:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:40:12,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354013706] [2021-04-15 05:40:12,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536225641] [2021-04-15 05:40:12,996 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:40:13,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:40:13,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:40:13,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:40:13,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:40:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:40:13,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:40:13,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-04-15 05:40:13,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646792640] [2021-04-15 05:40:13,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:40:13,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:40:13,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:40:13,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:40:13,326 INFO L87 Difference]: Start difference. First operand 45975 states and 178027 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:15,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:40:15,291 INFO L93 Difference]: Finished difference Result 50452 states and 192814 transitions. [2021-04-15 05:40:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:40:15,295 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:40:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:40:15,465 INFO L225 Difference]: With dead ends: 50452 [2021-04-15 05:40:15,465 INFO L226 Difference]: Without dead ends: 50452 [2021-04-15 05:40:15,465 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 882.3ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:40:15,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50452 states. [2021-04-15 05:40:16,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50452 to 46095. [2021-04-15 05:40:16,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46095 states, 46094 states have (on average 3.870243415628932) internal successors, (178395), 46094 states have internal predecessors, (178395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:16,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46095 states to 46095 states and 178395 transitions. [2021-04-15 05:40:16,701 INFO L78 Accepts]: Start accepts. Automaton has 46095 states and 178395 transitions. Word has length 28 [2021-04-15 05:40:16,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:40:16,701 INFO L480 AbstractCegarLoop]: Abstraction has 46095 states and 178395 transitions. [2021-04-15 05:40:16,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:16,701 INFO L276 IsEmpty]: Start isEmpty. Operand 46095 states and 178395 transitions. [2021-04-15 05:40:16,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:40:16,774 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:40:16,774 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:40:16,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:40:16,974 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:40:16,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:40:16,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1414052632, now seen corresponding path program 83 times [2021-04-15 05:40:16,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:40:16,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572174803] [2021-04-15 05:40:16,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:40:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:40:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:40:17,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572174803] [2021-04-15 05:40:17,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603504894] [2021-04-15 05:40:17,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:40:17,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:40:17,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:40:17,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:40:17,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:40:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:40:17,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:40:17,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-04-15 05:40:17,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970394350] [2021-04-15 05:40:17,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:40:17,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:40:17,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:40:17,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:40:17,373 INFO L87 Difference]: Start difference. First operand 46095 states and 178395 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:18,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:40:18,515 INFO L93 Difference]: Finished difference Result 50630 states and 193451 transitions. [2021-04-15 05:40:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 05:40:18,518 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:40:18,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:40:18,660 INFO L225 Difference]: With dead ends: 50630 [2021-04-15 05:40:18,660 INFO L226 Difference]: Without dead ends: 50618 [2021-04-15 05:40:18,661 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 563.1ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:40:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50618 states. [2021-04-15 05:40:19,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50618 to 46227. [2021-04-15 05:40:19,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46227 states, 46226 states have (on average 3.868407389780643) internal successors, (178821), 46226 states have internal predecessors, (178821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:20,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46227 states to 46227 states and 178821 transitions. [2021-04-15 05:40:20,272 INFO L78 Accepts]: Start accepts. Automaton has 46227 states and 178821 transitions. Word has length 28 [2021-04-15 05:40:20,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:40:20,272 INFO L480 AbstractCegarLoop]: Abstraction has 46227 states and 178821 transitions. [2021-04-15 05:40:20,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:20,272 INFO L276 IsEmpty]: Start isEmpty. Operand 46227 states and 178821 transitions. [2021-04-15 05:40:20,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:40:20,348 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:40:20,348 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:40:20,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:40:20,553 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:40:20,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:40:20,553 INFO L82 PathProgramCache]: Analyzing trace with hash 421559068, now seen corresponding path program 84 times [2021-04-15 05:40:20,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:40:20,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212896715] [2021-04-15 05:40:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:40:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:40:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:40:20,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212896715] [2021-04-15 05:40:20,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371823129] [2021-04-15 05:40:20,711 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:40:20,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:40:20,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:40:20,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:40:20,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:40:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:40:20,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:40:20,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-04-15 05:40:20,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121594105] [2021-04-15 05:40:20,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:40:20,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:40:20,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:40:20,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:40:20,991 INFO L87 Difference]: Start difference. First operand 46227 states and 178821 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:22,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:40:22,261 INFO L93 Difference]: Finished difference Result 50594 states and 193367 transitions. [2021-04-15 05:40:22,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:40:22,264 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:40:22,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:40:22,414 INFO L225 Difference]: With dead ends: 50594 [2021-04-15 05:40:22,415 INFO L226 Difference]: Without dead ends: 50574 [2021-04-15 05:40:22,415 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 694.8ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-04-15 05:40:22,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50574 states. [2021-04-15 05:40:23,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50574 to 46227. [2021-04-15 05:40:23,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46227 states, 46226 states have (on average 3.8683208583913813) internal successors, (178817), 46226 states have internal predecessors, (178817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46227 states to 46227 states and 178817 transitions. [2021-04-15 05:40:23,729 INFO L78 Accepts]: Start accepts. Automaton has 46227 states and 178817 transitions. Word has length 28 [2021-04-15 05:40:23,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:40:23,729 INFO L480 AbstractCegarLoop]: Abstraction has 46227 states and 178817 transitions. [2021-04-15 05:40:23,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:23,729 INFO L276 IsEmpty]: Start isEmpty. Operand 46227 states and 178817 transitions. [2021-04-15 05:40:23,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:40:23,801 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:40:23,801 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:40:24,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-04-15 05:40:24,002 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:40:24,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:40:24,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1989119940, now seen corresponding path program 166 times [2021-04-15 05:40:24,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:40:24,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843445771] [2021-04-15 05:40:24,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:40:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:40:24,368 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-04-15 05:40:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:40:24,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843445771] [2021-04-15 05:40:24,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483254327] [2021-04-15 05:40:24,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:40:24,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:40:24,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:40:24,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:40:24,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:40:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:40:24,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:40:24,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:40:24,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864320459] [2021-04-15 05:40:24,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:40:24,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:40:24,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:40:24,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:40:24,737 INFO L87 Difference]: Start difference. First operand 46227 states and 178817 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:26,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:40:26,153 INFO L93 Difference]: Finished difference Result 51188 states and 196382 transitions. [2021-04-15 05:40:26,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:40:26,156 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:40:26,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:40:26,298 INFO L225 Difference]: With dead ends: 51188 [2021-04-15 05:40:26,298 INFO L226 Difference]: Without dead ends: 51175 [2021-04-15 05:40:26,299 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 773.8ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:40:26,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51175 states. [2021-04-15 05:40:27,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51175 to 48960. [2021-04-15 05:40:27,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48960 states, 48959 states have (on average 3.8768152944300334) internal successors, (189805), 48959 states have internal predecessors, (189805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:27,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48960 states to 48960 states and 189805 transitions. [2021-04-15 05:40:27,496 INFO L78 Accepts]: Start accepts. Automaton has 48960 states and 189805 transitions. Word has length 28 [2021-04-15 05:40:27,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:40:27,496 INFO L480 AbstractCegarLoop]: Abstraction has 48960 states and 189805 transitions. [2021-04-15 05:40:27,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:27,496 INFO L276 IsEmpty]: Start isEmpty. Operand 48960 states and 189805 transitions. [2021-04-15 05:40:27,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:40:27,572 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:40:27,572 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:40:27,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-04-15 05:40:27,773 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:40:27,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:40:27,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1306375610, now seen corresponding path program 167 times [2021-04-15 05:40:27,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:40:27,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266694054] [2021-04-15 05:40:27,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:40:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:40:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:40:27,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266694054] [2021-04-15 05:40:27,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617339660] [2021-04-15 05:40:27,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:40:27,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:40:27,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:40:27,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:40:27,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:40:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:40:28,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:40:28,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:40:28,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440578064] [2021-04-15 05:40:28,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:40:28,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:40:28,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:40:28,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:40:28,230 INFO L87 Difference]: Start difference. First operand 48960 states and 189805 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:29,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:40:29,621 INFO L93 Difference]: Finished difference Result 54536 states and 207828 transitions. [2021-04-15 05:40:29,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 05:40:29,625 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:40:29,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:40:29,774 INFO L225 Difference]: With dead ends: 54536 [2021-04-15 05:40:29,774 INFO L226 Difference]: Without dead ends: 54536 [2021-04-15 05:40:29,774 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 614.9ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:40:29,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54536 states. [2021-04-15 05:40:30,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54536 to 43500. [2021-04-15 05:40:30,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43500 states, 43499 states have (on average 3.8642957309363433) internal successors, (168093), 43499 states have internal predecessors, (168093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43500 states to 43500 states and 168093 transitions. [2021-04-15 05:40:31,061 INFO L78 Accepts]: Start accepts. Automaton has 43500 states and 168093 transitions. Word has length 28 [2021-04-15 05:40:31,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:40:31,061 INFO L480 AbstractCegarLoop]: Abstraction has 43500 states and 168093 transitions. [2021-04-15 05:40:31,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:31,061 INFO L276 IsEmpty]: Start isEmpty. Operand 43500 states and 168093 transitions. [2021-04-15 05:40:31,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:40:31,130 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:40:31,130 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:40:31,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-04-15 05:40:31,330 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:40:31,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:40:31,331 INFO L82 PathProgramCache]: Analyzing trace with hash 986257146, now seen corresponding path program 168 times [2021-04-15 05:40:31,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:40:31,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427000685] [2021-04-15 05:40:31,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:40:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:40:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:40:31,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427000685] [2021-04-15 05:40:31,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543827083] [2021-04-15 05:40:31,462 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:40:31,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:40:31,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:40:31,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:40:31,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:40:31,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:40:31,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:40:31,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:40:31,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177212977] [2021-04-15 05:40:31,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:40:31,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:40:31,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:40:31,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:40:31,820 INFO L87 Difference]: Start difference. First operand 43500 states and 168093 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:33,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:40:33,286 INFO L93 Difference]: Finished difference Result 48376 states and 184512 transitions. [2021-04-15 05:40:33,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:40:33,289 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:40:33,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:40:33,798 INFO L225 Difference]: With dead ends: 48376 [2021-04-15 05:40:33,798 INFO L226 Difference]: Without dead ends: 48376 [2021-04-15 05:40:33,798 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 845.0ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-04-15 05:40:33,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48376 states. [2021-04-15 05:40:34,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48376 to 44333. [2021-04-15 05:40:34,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44333 states, 44332 states have (on average 3.8629206893440404) internal successors, (171251), 44332 states have internal predecessors, (171251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:35,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44333 states to 44333 states and 171251 transitions. [2021-04-15 05:40:35,065 INFO L78 Accepts]: Start accepts. Automaton has 44333 states and 171251 transitions. Word has length 28 [2021-04-15 05:40:35,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:40:35,065 INFO L480 AbstractCegarLoop]: Abstraction has 44333 states and 171251 transitions. [2021-04-15 05:40:35,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:35,065 INFO L276 IsEmpty]: Start isEmpty. Operand 44333 states and 171251 transitions. [2021-04-15 05:40:35,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:40:35,136 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:40:35,136 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:40:35,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-04-15 05:40:35,337 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:40:35,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:40:35,338 INFO L82 PathProgramCache]: Analyzing trace with hash -22913030, now seen corresponding path program 169 times [2021-04-15 05:40:35,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:40:35,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290777914] [2021-04-15 05:40:35,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:40:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:40:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:40:35,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290777914] [2021-04-15 05:40:35,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604914185] [2021-04-15 05:40:35,513 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:40:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:40:35,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:40:35,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:40:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:40:35,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:40:35,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-04-15 05:40:35,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607240446] [2021-04-15 05:40:35,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:40:35,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:40:35,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:40:35,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:40:35,869 INFO L87 Difference]: Start difference. First operand 44333 states and 171251 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:37,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:40:37,202 INFO L93 Difference]: Finished difference Result 46090 states and 177112 transitions. [2021-04-15 05:40:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:40:37,205 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:40:37,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:40:37,326 INFO L225 Difference]: With dead ends: 46090 [2021-04-15 05:40:37,326 INFO L226 Difference]: Without dead ends: 46090 [2021-04-15 05:40:37,326 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 602.4ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:40:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46090 states. [2021-04-15 05:40:38,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46090 to 44341. [2021-04-15 05:40:38,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44341 states, 44340 states have (on average 3.8627649977447) internal successors, (171275), 44340 states have internal predecessors, (171275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44341 states to 44341 states and 171275 transitions. [2021-04-15 05:40:38,465 INFO L78 Accepts]: Start accepts. Automaton has 44341 states and 171275 transitions. Word has length 28 [2021-04-15 05:40:38,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:40:38,465 INFO L480 AbstractCegarLoop]: Abstraction has 44341 states and 171275 transitions. [2021-04-15 05:40:38,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:38,465 INFO L276 IsEmpty]: Start isEmpty. Operand 44341 states and 171275 transitions. [2021-04-15 05:40:38,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:40:38,537 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:40:38,537 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:40:38,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:40:38,745 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:40:38,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:40:38,745 INFO L82 PathProgramCache]: Analyzing trace with hash -120181494, now seen corresponding path program 170 times [2021-04-15 05:40:38,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:40:38,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950141770] [2021-04-15 05:40:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:40:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:40:38,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:40:38,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950141770] [2021-04-15 05:40:38,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359007497] [2021-04-15 05:40:38,889 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:40:38,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:40:38,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:40:38,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 05:40:38,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:40:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:40:39,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:40:39,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-04-15 05:40:39,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535902769] [2021-04-15 05:40:39,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:40:39,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:40:39,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:40:39,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:40:39,239 INFO L87 Difference]: Start difference. First operand 44341 states and 171275 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:40:40,562 INFO L93 Difference]: Finished difference Result 45810 states and 176190 transitions. [2021-04-15 05:40:40,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:40:40,566 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:40:40,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:40:40,690 INFO L225 Difference]: With dead ends: 45810 [2021-04-15 05:40:40,690 INFO L226 Difference]: Without dead ends: 45810 [2021-04-15 05:40:40,691 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 566.2ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:40:40,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45810 states. [2021-04-15 05:40:41,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45810 to 44235. [2021-04-15 05:40:41,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44235 states, 44234 states have (on average 3.862436135099697) internal successors, (170851), 44234 states have internal predecessors, (170851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:41,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44235 states to 44235 states and 170851 transitions. [2021-04-15 05:40:41,868 INFO L78 Accepts]: Start accepts. Automaton has 44235 states and 170851 transitions. Word has length 28 [2021-04-15 05:40:41,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:40:41,868 INFO L480 AbstractCegarLoop]: Abstraction has 44235 states and 170851 transitions. [2021-04-15 05:40:41,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:41,868 INFO L276 IsEmpty]: Start isEmpty. Operand 44235 states and 170851 transitions. [2021-04-15 05:40:41,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:40:41,940 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:40:41,940 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:40:42,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:40:42,143 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:40:42,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:40:42,143 INFO L82 PathProgramCache]: Analyzing trace with hash -915745990, now seen corresponding path program 171 times [2021-04-15 05:40:42,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:40:42,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281716508] [2021-04-15 05:40:42,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:40:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:40:42,605 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-04-15 05:40:42,731 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-04-15 05:40:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:40:43,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281716508] [2021-04-15 05:40:43,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656433981] [2021-04-15 05:40:43,008 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:40:43,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:40:43,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:40:43,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 05:40:43,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:40:44,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:40:44,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-04-15 05:40:44,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:40:44,621 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-04-15 05:40:44,622 INFO L628 ElimStorePlain]: treesize reduction 68, result has 39.8 percent of original size [2021-04-15 05:40:44,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:40:44,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:82 [2021-04-15 05:40:44,947 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-04-15 05:40:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:40:45,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:40:45,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-04-15 05:40:45,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294107585] [2021-04-15 05:40:45,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 05:40:45,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:40:45,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 05:40:45,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:40:45,024 INFO L87 Difference]: Start difference. First operand 44235 states and 170851 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:40:45,567 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-04-15 05:40:45,977 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 05:40:46,409 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-04-15 05:40:46,969 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-04-15 05:40:47,238 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-04-15 05:40:47,689 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-04-15 05:40:48,198 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2021-04-15 05:40:48,718 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-04-15 05:40:49,067 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-04-15 05:40:49,830 WARN L205 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-04-15 05:40:50,151 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-04-15 05:40:50,412 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-04-15 05:40:50,948 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-04-15 05:40:51,339 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-04-15 05:40:51,767 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-04-15 05:40:52,495 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-04-15 05:40:52,811 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-04-15 05:40:53,602 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-04-15 05:40:54,406 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-04-15 05:40:54,592 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-04-15 05:40:55,349 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-04-15 05:40:55,987 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-04-15 05:40:56,482 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-04-15 05:40:56,769 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-04-15 05:40:57,229 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-04-15 05:40:57,736 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-04-15 05:40:58,070 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-04-15 05:40:58,524 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-04-15 05:40:58,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:40:58,732 INFO L93 Difference]: Finished difference Result 51482 states and 191998 transitions. [2021-04-15 05:40:58,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 05:40:58,736 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 05:40:58,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:40:58,876 INFO L225 Difference]: With dead ends: 51482 [2021-04-15 05:40:58,876 INFO L226 Difference]: Without dead ends: 51422 [2021-04-15 05:40:58,876 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 11966.1ms TimeCoverageRelationStatistics Valid=468, Invalid=2612, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 05:40:59,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51422 states. [2021-04-15 05:40:59,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51422 to 44332. [2021-04-15 05:40:59,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44332 states, 44331 states have (on average 3.861857390990503) internal successors, (171200), 44331 states have internal predecessors, (171200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:41:00,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44332 states to 44332 states and 171200 transitions. [2021-04-15 05:41:00,175 INFO L78 Accepts]: Start accepts. Automaton has 44332 states and 171200 transitions. Word has length 30 [2021-04-15 05:41:00,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:41:00,175 INFO L480 AbstractCegarLoop]: Abstraction has 44332 states and 171200 transitions. [2021-04-15 05:41:00,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:41:00,176 INFO L276 IsEmpty]: Start isEmpty. Operand 44332 states and 171200 transitions. [2021-04-15 05:41:00,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:41:00,255 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:41:00,255 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:41:00,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:41:00,456 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:41:00,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:41:00,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1350823290, now seen corresponding path program 172 times [2021-04-15 05:41:00,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:41:00,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775444106] [2021-04-15 05:41:00,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:41:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:41:00,907 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-04-15 05:41:01,035 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-04-15 05:41:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:41:01,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775444106] [2021-04-15 05:41:01,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453983586] [2021-04-15 05:41:01,313 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:41:01,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:41:01,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:41:01,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 05:41:01,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:41:02,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:41:02,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:41:02,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:41:02,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-04-15 05:41:02,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:41:02,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:41:02,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:41:02,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-04-15 05:41:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:41:02,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:41:02,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-04-15 05:41:02,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8643541] [2021-04-15 05:41:02,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:41:02,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:41:02,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:41:02,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:41:02,614 INFO L87 Difference]: Start difference. First operand 44332 states and 171200 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:41:02,959 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-04-15 05:41:03,186 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 05:41:03,521 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-04-15 05:41:04,047 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-04-15 05:41:04,277 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 05:41:04,822 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-04-15 05:41:05,346 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-04-15 05:41:05,673 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-04-15 05:41:05,960 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 05:41:06,476 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-04-15 05:41:06,975 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-04-15 05:41:07,192 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-04-15 05:41:07,511 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-04-15 05:41:08,019 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-04-15 05:41:08,316 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-04-15 05:41:08,758 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-04-15 05:41:09,124 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-04-15 05:41:09,401 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-04-15 05:41:09,632 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-04-15 05:41:10,013 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-04-15 05:41:10,692 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-04-15 05:41:11,296 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-04-15 05:41:11,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:41:11,518 INFO L93 Difference]: Finished difference Result 51496 states and 192084 transitions. [2021-04-15 05:41:11,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 05:41:11,522 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 05:41:11,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:41:11,657 INFO L225 Difference]: With dead ends: 51496 [2021-04-15 05:41:11,658 INFO L226 Difference]: Without dead ends: 51466 [2021-04-15 05:41:11,658 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 8282.0ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 05:41:11,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51466 states. [2021-04-15 05:41:12,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51466 to 44378. [2021-04-15 05:41:12,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44378 states, 44377 states have (on average 3.861527367780607) internal successors, (171363), 44377 states have internal predecessors, (171363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:41:12,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44378 states to 44378 states and 171363 transitions. [2021-04-15 05:41:12,766 INFO L78 Accepts]: Start accepts. Automaton has 44378 states and 171363 transitions. Word has length 30 [2021-04-15 05:41:12,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:41:12,766 INFO L480 AbstractCegarLoop]: Abstraction has 44378 states and 171363 transitions. [2021-04-15 05:41:12,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:41:12,766 INFO L276 IsEmpty]: Start isEmpty. Operand 44378 states and 171363 transitions. [2021-04-15 05:41:12,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:41:12,838 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:41:12,838 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:41:13,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable500 [2021-04-15 05:41:13,039 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:41:13,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:41:13,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1352714698, now seen corresponding path program 173 times [2021-04-15 05:41:13,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:41:13,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637089423] [2021-04-15 05:41:13,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:41:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:41:13,508 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-04-15 05:41:13,860 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-04-15 05:41:14,002 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-04-15 05:41:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:41:14,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637089423] [2021-04-15 05:41:14,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016310782] [2021-04-15 05:41:14,325 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:41:14,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:41:14,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:41:14,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 05:41:14,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:41:15,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:41:15,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:41:15,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:41:15,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:41:15,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:41:15,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-04-15 05:41:15,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:41:15,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:41:15,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:41:15,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-04-15 05:41:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:41:15,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:41:15,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-04-15 05:41:15,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688459977] [2021-04-15 05:41:15,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 05:41:15,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:41:15,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 05:41:15,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:41:15,692 INFO L87 Difference]: Start difference. First operand 44378 states and 171363 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:41:16,010 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-04-15 05:41:16,395 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-04-15 05:41:16,971 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-04-15 05:41:17,258 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-04-15 05:41:17,585 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-04-15 05:41:17,846 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-04-15 05:41:18,483 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-04-15 05:41:19,250 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-04-15 05:41:19,640 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-04-15 05:41:20,285 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-04-15 05:41:20,628 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-04-15 05:41:20,883 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-04-15 05:41:21,141 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-04-15 05:41:21,479 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-04-15 05:41:22,449 WARN L205 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-04-15 05:41:22,954 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-04-15 05:41:23,183 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 05:41:23,586 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-04-15 05:41:24,163 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-04-15 05:41:24,635 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-04-15 05:41:25,319 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2021-04-15 05:41:26,001 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-04-15 05:41:26,456 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-04-15 05:41:26,782 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-04-15 05:41:27,330 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-04-15 05:41:27,752 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-04-15 05:41:28,729 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-04-15 05:41:29,072 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-04-15 05:41:29,303 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-04-15 05:41:29,548 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-04-15 05:41:29,805 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 05:41:30,318 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-04-15 05:41:31,070 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-04-15 05:41:31,336 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-04-15 05:41:31,783 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-04-15 05:41:32,132 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-04-15 05:41:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:41:33,279 INFO L93 Difference]: Finished difference Result 62882 states and 234711 transitions. [2021-04-15 05:41:33,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 05:41:33,283 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 05:41:33,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:41:33,454 INFO L225 Difference]: With dead ends: 62882 [2021-04-15 05:41:33,454 INFO L226 Difference]: Without dead ends: 62867 [2021-04-15 05:41:33,454 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 15620.6ms TimeCoverageRelationStatistics Valid=541, Invalid=3619, Unknown=0, NotChecked=0, Total=4160 [2021-04-15 05:41:33,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62867 states. [2021-04-15 05:41:34,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62867 to 44417. [2021-04-15 05:41:34,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44417 states, 44416 states have (on average 3.8612436959654177) internal successors, (171501), 44416 states have internal predecessors, (171501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:41:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44417 states to 44417 states and 171501 transitions. [2021-04-15 05:41:34,640 INFO L78 Accepts]: Start accepts. Automaton has 44417 states and 171501 transitions. Word has length 30 [2021-04-15 05:41:34,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:41:34,640 INFO L480 AbstractCegarLoop]: Abstraction has 44417 states and 171501 transitions. [2021-04-15 05:41:34,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:41:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 44417 states and 171501 transitions. [2021-04-15 05:41:34,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:41:34,715 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:41:34,715 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:41:34,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-04-15 05:41:34,916 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:41:34,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:41:34,916 INFO L82 PathProgramCache]: Analyzing trace with hash -547667522, now seen corresponding path program 174 times [2021-04-15 05:41:34,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:41:34,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588602552] [2021-04-15 05:41:34,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:41:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:41:35,417 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-04-15 05:41:35,555 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-04-15 05:41:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:41:35,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588602552] [2021-04-15 05:41:35,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657649095] [2021-04-15 05:41:35,842 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:41:35,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:41:35,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:41:35,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 05:41:35,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:41:37,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:41:37,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:41:37,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:41:37,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:41:37,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:41:37,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:41:37,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-04-15 05:41:37,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:41:37,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:41:37,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:41:37,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:5 [2021-04-15 05:41:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:41:37,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:41:37,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-04-15 05:41:37,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115693132] [2021-04-15 05:41:37,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:41:37,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:41:37,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:41:37,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:41:37,448 INFO L87 Difference]: Start difference. First operand 44417 states and 171501 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:41:37,923 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-04-15 05:41:38,187 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 05:41:38,542 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-04-15 05:41:39,168 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-04-15 05:41:39,434 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 05:41:39,810 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-04-15 05:41:40,351 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-04-15 05:41:40,960 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-04-15 05:41:41,416 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-04-15 05:41:42,628 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-04-15 05:41:42,968 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-04-15 05:41:43,540 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-04-15 05:41:43,943 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-04-15 05:41:44,137 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-04-15 05:41:44,629 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-04-15 05:41:45,089 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-04-15 05:41:45,710 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-04-15 05:41:45,978 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-04-15 05:41:46,228 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-04-15 05:41:46,795 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-04-15 05:41:47,438 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-04-15 05:41:47,893 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-04-15 05:41:48,443 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-04-15 05:41:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:41:48,702 INFO L93 Difference]: Finished difference Result 53657 states and 198704 transitions. [2021-04-15 05:41:48,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 05:41:48,707 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 05:41:48,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:41:48,844 INFO L225 Difference]: With dead ends: 53657 [2021-04-15 05:41:48,845 INFO L226 Difference]: Without dead ends: 53585 [2021-04-15 05:41:48,845 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 9602.2ms TimeCoverageRelationStatistics Valid=511, Invalid=2141, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 05:41:48,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53585 states. [2021-04-15 05:41:49,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53585 to 44441. [2021-04-15 05:41:49,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44441 states, 44440 states have (on average 3.860936093609361) internal successors, (171580), 44440 states have internal predecessors, (171580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:41:49,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44441 states to 44441 states and 171580 transitions. [2021-04-15 05:41:49,987 INFO L78 Accepts]: Start accepts. Automaton has 44441 states and 171580 transitions. Word has length 30 [2021-04-15 05:41:49,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:41:49,987 INFO L480 AbstractCegarLoop]: Abstraction has 44441 states and 171580 transitions. [2021-04-15 05:41:49,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:41:49,988 INFO L276 IsEmpty]: Start isEmpty. Operand 44441 states and 171580 transitions. [2021-04-15 05:41:50,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:41:50,305 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:41:50,305 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:41:50,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-04-15 05:41:50,527 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:41:50,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:41:50,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1002714042, now seen corresponding path program 175 times [2021-04-15 05:41:50,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:41:50,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105390333] [2021-04-15 05:41:50,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:41:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:41:50,980 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-04-15 05:41:51,351 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-04-15 05:41:51,500 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-04-15 05:41:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:41:51,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105390333] [2021-04-15 05:41:51,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903108756] [2021-04-15 05:41:51,774 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:41:51,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:41:51,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 05:41:51,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:41:52,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:41:52,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:41:52,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:41:52,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:41:52,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:41:52,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:41:52,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-04-15 05:41:52,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:41:52,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:41:52,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:41:52,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-04-15 05:41:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:41:52,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:41:52,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-04-15 05:41:52,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011508380] [2021-04-15 05:41:52,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:41:52,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:41:52,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:41:52,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:41:52,932 INFO L87 Difference]: Start difference. First operand 44441 states and 171580 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:41:53,261 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-04-15 05:41:53,764 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-04-15 05:41:54,533 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-04-15 05:41:54,707 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:41:55,006 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-04-15 05:41:55,353 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-04-15 05:41:55,632 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-04-15 05:41:56,474 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-04-15 05:41:57,594 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-04-15 05:41:58,009 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-04-15 05:41:58,442 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-04-15 05:41:58,733 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-04-15 05:41:58,998 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-04-15 05:41:59,344 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-04-15 05:41:59,892 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-04-15 05:42:00,706 WARN L205 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-04-15 05:42:01,004 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 05:42:01,417 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-04-15 05:42:01,993 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-04-15 05:42:02,520 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-04-15 05:42:02,881 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-04-15 05:42:03,315 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-04-15 05:42:03,876 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-04-15 05:42:04,416 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-04-15 05:42:05,442 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-04-15 05:42:06,135 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-04-15 05:42:06,313 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 05:42:06,566 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 05:42:07,185 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-04-15 05:42:07,667 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-04-15 05:42:08,526 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-04-15 05:42:09,433 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-04-15 05:42:09,992 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-04-15 05:42:10,334 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-04-15 05:42:11,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:42:11,294 INFO L93 Difference]: Finished difference Result 70235 states and 261042 transitions. [2021-04-15 05:42:11,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-04-15 05:42:11,299 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 05:42:11,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:42:11,493 INFO L225 Difference]: With dead ends: 70235 [2021-04-15 05:42:11,494 INFO L226 Difference]: Without dead ends: 70220 [2021-04-15 05:42:11,494 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 14618.9ms TimeCoverageRelationStatistics Valid=540, Invalid=3750, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 05:42:11,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70220 states. [2021-04-15 05:42:12,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70220 to 44499. [2021-04-15 05:42:12,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44499 states, 44498 states have (on average 3.860825205627219) internal successors, (171799), 44498 states have internal predecessors, (171799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:42:12,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44499 states to 44499 states and 171799 transitions. [2021-04-15 05:42:12,720 INFO L78 Accepts]: Start accepts. Automaton has 44499 states and 171799 transitions. Word has length 30 [2021-04-15 05:42:12,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:42:12,720 INFO L480 AbstractCegarLoop]: Abstraction has 44499 states and 171799 transitions. [2021-04-15 05:42:12,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:42:12,720 INFO L276 IsEmpty]: Start isEmpty. Operand 44499 states and 171799 transitions. [2021-04-15 05:42:12,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:42:12,993 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:42:12,993 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:42:13,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:42:13,214 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:42:13,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:42:13,214 INFO L82 PathProgramCache]: Analyzing trace with hash 26395198, now seen corresponding path program 176 times [2021-04-15 05:42:13,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:42:13,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147030219] [2021-04-15 05:42:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:42:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:42:13,623 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-04-15 05:42:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:42:14,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147030219] [2021-04-15 05:42:14,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828727367] [2021-04-15 05:42:14,079 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:42:14,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:42:14,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:42:14,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 05:42:14,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:42:15,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:42:15,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:42:15,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:42:15,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:42:15,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:42:15,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2021-04-15 05:42:15,253 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-04-15 05:42:15,341 INFO L628 ElimStorePlain]: treesize reduction 21, result has 44.7 percent of original size [2021-04-15 05:42:15,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:42:15,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:17 [2021-04-15 05:42:15,605 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:42:15,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:42:15,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-04-15 05:42:15,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276331802] [2021-04-15 05:42:15,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:42:15,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:42:15,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:42:15,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:42:15,606 INFO L87 Difference]: Start difference. First operand 44499 states and 171799 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:42:15,952 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-04-15 05:42:16,272 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-04-15 05:42:16,792 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-04-15 05:42:17,208 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-04-15 05:42:18,051 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-04-15 05:42:18,831 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-04-15 05:42:19,055 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-04-15 05:42:19,388 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-04-15 05:42:19,824 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-04-15 05:42:20,280 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-04-15 05:42:20,943 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-04-15 05:42:21,320 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-04-15 05:42:21,902 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-04-15 05:42:22,928 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-04-15 05:42:23,572 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-04-15 05:42:23,895 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-04-15 05:42:24,220 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-04-15 05:42:24,840 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-04-15 05:42:25,315 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-04-15 05:42:25,699 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-04-15 05:42:26,322 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-04-15 05:42:26,940 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-04-15 05:42:27,275 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-04-15 05:42:28,129 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-04-15 05:42:28,377 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-04-15 05:42:29,152 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-04-15 05:42:30,098 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-04-15 05:42:30,513 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-04-15 05:42:30,884 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-04-15 05:42:31,523 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-04-15 05:42:31,960 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-04-15 05:42:33,271 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-04-15 05:42:33,949 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-04-15 05:42:34,404 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-04-15 05:42:36,011 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-04-15 05:42:36,496 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:42:36,745 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 05:42:37,318 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-04-15 05:42:37,627 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 05:42:37,861 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-04-15 05:42:38,087 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-04-15 05:42:38,645 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-04-15 05:42:38,946 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:42:39,467 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-04-15 05:42:40,530 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 05:42:41,270 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-04-15 05:42:41,729 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-04-15 05:42:42,366 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-04-15 05:42:43,212 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 05:42:43,834 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-04-15 05:42:44,775 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-04-15 05:42:45,197 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 05:42:45,796 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-04-15 05:42:46,368 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-04-15 05:42:46,953 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-04-15 05:42:47,702 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-04-15 05:42:48,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:42:48,598 INFO L93 Difference]: Finished difference Result 74130 states and 274173 transitions. [2021-04-15 05:42:48,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-04-15 05:42:48,602 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 05:42:48,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:42:48,801 INFO L225 Difference]: With dead ends: 74130 [2021-04-15 05:42:48,801 INFO L226 Difference]: Without dead ends: 74100 [2021-04-15 05:42:48,802 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2953 ImplicationChecksByTransitivity, 21589.0ms TimeCoverageRelationStatistics Valid=712, Invalid=8218, Unknown=0, NotChecked=0, Total=8930 [2021-04-15 05:42:48,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74100 states. [2021-04-15 05:42:49,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74100 to 44505. [2021-04-15 05:42:49,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44505 states, 44504 states have (on average 3.8610012583138595) internal successors, (171830), 44504 states have internal predecessors, (171830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:42:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44505 states to 44505 states and 171830 transitions. [2021-04-15 05:42:50,118 INFO L78 Accepts]: Start accepts. Automaton has 44505 states and 171830 transitions. Word has length 30 [2021-04-15 05:42:50,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:42:50,118 INFO L480 AbstractCegarLoop]: Abstraction has 44505 states and 171830 transitions. [2021-04-15 05:42:50,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:42:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 44505 states and 171830 transitions. [2021-04-15 05:42:50,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:42:50,191 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:42:50,191 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:42:50,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:42:50,392 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:42:50,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:42:50,392 INFO L82 PathProgramCache]: Analyzing trace with hash 2016530042, now seen corresponding path program 177 times [2021-04-15 05:42:50,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:42:50,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480772486] [2021-04-15 05:42:50,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:42:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:42:50,945 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-04-15 05:42:51,097 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 Received shutdown request... [2021-04-15 05:42:51,440 WARN L222 SmtUtils]: Removed 3 from assertion stack [2021-04-15 05:42:51,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509 [2021-04-15 05:42:51,442 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 05:42:51,445 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 05:42:51,446 INFO L202 PluginConnector]: Adding new model sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 05:42:51 BasicIcfg [2021-04-15 05:42:51,446 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 05:42:51,446 INFO L168 Benchmark]: Toolchain (without parser) took 809206.83 ms. Allocated memory was 377.5 MB in the beginning and 14.2 GB in the end (delta: 13.9 GB). Free memory was 357.6 MB in the beginning and 12.2 GB in the end (delta: -11.8 GB). Peak memory consumption was 2.1 GB. Max. memory is 16.0 GB. [2021-04-15 05:42:51,446 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 377.5 MB. Free memory was 358.8 MB in the beginning and 358.7 MB in the end (delta: 79.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 05:42:51,446 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.57 ms. Allocated memory is still 377.5 MB. Free memory was 357.5 MB in the beginning and 356.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 05:42:51,446 INFO L168 Benchmark]: Boogie Preprocessor took 20.83 ms. Allocated memory is still 377.5 MB. Free memory was 356.1 MB in the beginning and 355.1 MB in the end (delta: 988.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 05:42:51,446 INFO L168 Benchmark]: RCFGBuilder took 303.32 ms. Allocated memory is still 377.5 MB. Free memory was 355.0 MB in the beginning and 342.5 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-04-15 05:42:51,446 INFO L168 Benchmark]: TraceAbstraction took 808846.10 ms. Allocated memory was 377.5 MB in the beginning and 14.2 GB in the end (delta: 13.9 GB). Free memory was 342.0 MB in the beginning and 12.2 GB in the end (delta: -11.8 GB). Peak memory consumption was 2.0 GB. Max. memory is 16.0 GB. [2021-04-15 05:42:51,447 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 377.5 MB. Free memory was 358.8 MB in the beginning and 358.7 MB in the end (delta: 79.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 30.57 ms. Allocated memory is still 377.5 MB. Free memory was 357.5 MB in the beginning and 356.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.83 ms. Allocated memory is still 377.5 MB. Free memory was 356.1 MB in the beginning and 355.1 MB in the end (delta: 988.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 303.32 ms. Allocated memory is still 377.5 MB. Free memory was 355.0 MB in the beginning and 342.5 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 808846.10 ms. Allocated memory was 377.5 MB in the beginning and 14.2 GB in the end (delta: 13.9 GB). Free memory was 342.0 MB in the beginning and 12.2 GB in the end (delta: -11.8 GB). Peak memory consumption was 2.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 5ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 808741.3ms, OverallIterations: 263, TraceHistogramMax: 3, EmptinessCheckTime: 6328.0ms, AutomataDifference: 526000.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11665 SDtfs, 72715 SDslu, 88707 SDs, 0 SdLazy, 147455 SolverSat, 13036 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 83485.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16848 GetRequests, 5574 SyntacticMatches, 297 SemanticMatches, 10977 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184279 ImplicationChecksByTransitivity, 360660.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48960occurred in iteration=252, InterpolantAutomatonStates: 9791, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 97315.0ms AutomataMinimizationTime, 262 MinimizatonAttempts, 1395500 StatesRemovedByMinimization, 261 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 848.0ms SsaConstructionTime, 2584.3ms SatisfiabilityAnalysisTime, 116905.2ms InterpolantComputationTime, 13970 NumberOfCodeBlocks, 13970 NumberOfCodeBlocksAsserted, 907 NumberOfCheckSat, 13448 ConstructedInterpolants, 129 QuantifiedInterpolants, 134362 SizeOfPredicates, 1144 NumberOfNonLiveVariables, 18195 ConjunctsInSsa, 3931 ConjunctsInUnsatCore, 522 InterpolantComputations, 2 PerfectInterpolantSequences, 1041/4479 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